Season 1

Produced by Aniplex and Seven Arcs, Dog Days is directed by Keizo Kusakawa, series composition by Masaki Tsuzuki, character designs by Osamu Sakata, music by I've Sound, Maiko Iuchi, Susumu Natsume and Yui Isshiki, and produced by the production company Project DD. The series aired 13 episodes from April 2, 2011 to June 25, 2011 on Tokyo MX, Tochigi TV, Gunma TV, Chiba TV, TVK, TV Saitama and MBS, with subsequent runs on Chubu-Nippon Broadcasting and BS11. Six DVD and Blu-ray Disc volumes were released by Aniplex between July 27, 2011 and December 21, 2011.

# Episode title Japan original air date

Birth of a Hero!
Yūsha Tanjō! (勇者誕生!)

April 2, 2011
Shinku Izumi makes a promise with Rebecca Anderson to go flower-viewing during the last three days of Spring Break. However, while out alone trying out some acrobatic moves in school, a mysterious dog appears and opens a magical portal below Shinku, arriving in the magical land of Flognarde. He is greeted by a beautiful girl with dog ears and tail, who introduces herself as Princess Millefiori. She requests for his assistance to become their kingdom's Hero to drive away the forces of Galette which seeks to invade Biscotti.

The First Battle!
Hajimete no Ikusa! (はじめての戦!)

April 9, 2011
Cinque agrees with Princess Millhi's request and joins the battlefield before Biscotti's army fights a losing battle. Cinque manages to hold off the enemy's offensive fighting alongside Captain Éclair Martinozzi. However, the two must join forces to confront Galette's commander and most powerful warrior, Leonmichelli Galette des Rois.

Want to Go Back! Can't Go Back? Hero in Flognarde
Kaeritai! Kaerenai? Yūsha in Furonyarudo (帰りたい!帰れない?勇者inフロニャルド!)

April 16, 2011
The battle ends with Biscotti's victory, but Cinque learns that Millhiore was not aware that once he was summoned to Flonyard, he cannot return home. Meanwhile, Leonmichelli's younger brother, Gaul, learns of his sister's defeat and is eager to face Cinque in combat. 

Charge! Princess Rescue Battle!!
Totsugeki! Himesama Dakkansen!! (突撃!姫様奪還戦!!)

April 23, 2011
Gaul's special forces, the Génoise trio, kidnaps Millhiore and he challenges Cinque to a duel. Cinque, Éclair and chief researcher Ricotta Elmar come with a plan to storm the fortress where she is being held to rescue her in time for her victory concert. Heavily outnumbered by the enemy, Cinque and Éclair manage to turn the tides when the freelance knights Brioche Dalkian and Yukikaze Panettone come to assist them. 

Fierce Battle! Mion Fortress!
Gekitō! Mion Toride! (激闘!ミオン砦!)

April 30, 2011
Cinque and Gaul's duel is interrupted by Leonmichelli who reprimands both for ruining Biscotti's victory party. Almost running out of time for Millhiore's concert, Cinque comes with a plan to return the princess to the castle for her performance. 

The Fortune-Telling Princess
Hoshiyomi no Hime (星詠みの姫)

May 7, 2011
Cinque learns from Millhiore how she used her stargazing powers to learn about him and why she chose him as her hero. Meanwhile, Leonmichelli confirms by using her own stargazing powers that an ominous fate awaits them. 

Declaration of War
Sensen Hukoku (宣戦布告)

May 14, 2011
Desperate to change Millhiore and Cinque's dreadful fate, Leonmichelli challenges Biscotti for another battle with each country waging their most sacred treasures on it. Millhiore reluctantly accepts the challenge, unaware of her true intentions. 

The Day of War
Kaisen no Hi (開戦の日)

May 21, 2011
The day of the battle comes and it does not take long for Millhiore to confirm her suspicions about Leonmichelli's behavior and she joins Cinque and Éclair to storm the fortress where Leonmichelli is stationed to confront her. Meanwhile, Brioche and Yukikaze feel that a strange presence is approaching. 

The Battle of Grana Fortress
Gurana Toride Kōbōsen (グラナ砦攻防戦)

May 28, 2011
Bearing both sacred swords, Millhiore reaches the top of the fortress to confront Leonmtchelli, who trembles when she realizes that her actions are leading the princess to the same destiny she fought so much to avert, when a powerful and ominous creature appears before them. 

Hero, Princess, and a Light of Hope
Yūsha to Hime to Kibō no Hikari (勇者と姫と希望の光)

June 4, 2011
The monster grabs Millhiore and flees the fortress on a rampage. Cinque struggles to reach the princess before she is absorbed by the creature, while she learns that the monster is actually a fox deity cub whose body was pierced by a cursed sword. 

Dance the Night sky Like a Flower
Yozora ni Hana ga Mau yō ni (夜空に花が舞うように)

June 11, 2011
Cinque and Millhiore manage to subdue the monster and restore the fox cub to its former self. Yukikaze offers herself to take care of it and a huge concert featuring the princess is held to celebrate the end of the hostilities between Biscotti and Gallete.

The 4 Conditions
Yottsu no Jōken (4つの条件)

June 18, 2011
At last Ricotta and her assistants come with a way for Cinque to return home. However, she finds that by doing so, not only he will forget all memories and experiences of his time at Flonyard, but he will never be able to come back. Upon learning of it, Cinque asks Ricotta to not tell the truth to the others, as he does not want them to send him off with a sad face.

The Promise
Yakusoku (約束)

June 25, 2011
Just after Millhiore confesses her love for him, Cinque is sent back home and has no recollecions of his days at Flonyard. However, Ricotta learns that a way to make his memories return and be summoned back is possible, thanks to the possessions he left behind as a keepsake to his friends and the promise he made to them that he would indeed return. Upon regaining his memories, Cinque renews his vow to visit Flonyard again as soon as possible.

Season 2

A second anime season, called Dog Days' (ドッグデイズダッシュ Doggu Deizu Dasshu?), premiered on July 7, 2012 on Tokyo MX, with subsequent broadcasts on CBC, Chiba TV, TV Kanagawa, TV Saitama, Tochigi TV, Gunma TV, KBS Kyoto, Sun Television, and BS11. 

# Episode title Japan original air date

A Hero Appears!
Yūsha Kenzan! (勇者見参!)

July 7, 2012
Three months after leaving Flonyard, Cinque Izumi returns to Biscotti along with his friend Rebecca Anderson, while his cousin Nanami Takatsuki is summoned to Galette by Leomichelli and becomes her hero. After a brief reunion with Millhiore and his other friends, Cinque takes part in a special battle celebrating his return, soon after Nanami also joins the fight while Rebecca stays back at the castle with Millhiore. Watching the battle at her castle, Couvert Eschenbach Pastillage, the Princess of Pastillage, decides to set off for Biscotti to ask Rebecca to become her hero.

Pastillage Joins the Battle!
Pasutiyāju Sansen! (パスティヤージュ参戦!)

July 14, 2012
With one hero at each side, the special match between Biscotti and Gallete intensifies until the Pastillage army led by Couvert join the battle. After abducting Rebecca, Couvert has her forces confronting Cinque and Nanami's teams while she convinces Rebecca to join her side and be Pastillage's hero.

Three Heroes!
Yūsha San'nin! (勇者3人!)

July 21, 2012
Couvert and Rebecca join the fight and the three-way battle becomes even more intense until it ends with Gallete's victory. Cinque takes Nanami and Rebecca for a tour around Biscotti before he embarks for a special training camp with Éclair and Yukikaze. 

Biscotti Summer Camp
Bisukotti Natsu-gasshuku! (ビスコッティ夏合宿!)

July 28, 2012
Nanami accompanies Leo back to Gallete and Couvert returns to Pastillage bringing Rebecca with her. While the three nations make preparations for the upcoming special event, Cinque joins Eclair, Yukikaze and Noir from the Génoise trio in a training camp to improve their abilities. 

Galette Sword Style Record!
Galetto Kenfusen (ガレット剣風録!)

August 4, 2012
Upon hearing about some acts of thievery occurring in the Galletian city of Ayase, Leo sends a small team along Nanami to expose and arrest the culprits. They get the unexpected help of a mysterious stranger, who is later revealed as Isuka Makishima, Brioche's elder brother and a famous blacksmith. 

Pastillage's Hero King Legend
Pasutiyāju Eiyū Ō Densetsu (パスティヤージュ英雄王伝説)

August 11, 2012
The rulers and heroes of the three nations have a meeting in Pastillage in preparation for the next event. Couvert brings Cinque before a monument to the Legendary Hero who founded the country and they accidentally release Valério Calvados, the ancient Demon King sealed there. Valério creates a huge commotion throughout the palace until Adélaïde Grand Marnier, the hero who was sealed along him, appears to put him in his proper place. 

Battle at the Cave of Sealing!
Fūin-dōkutsu Ikusa! (封印洞窟戦!)

August 18, 2012
Adel, Valeri, Isuka and Brioche inspect a cave where they sealed some powerful demons in the past. When one of the seals is broken, a huge wave of mice demons break free. As the problem becomes more than the four can handle, Adel summons the other heroes who bring some friends with them to help against the mice. 

Esnart Arts and Music Festival
Esunāto Geijutsu Ongaku-sai (エスナート芸術音楽祭)

August 25, 2012
Millhiore is invited to sing at the Esnart Art and Music Festival in Pastillage. Just before her performance, the princess and Rebecca are attacked by a rogue cat deity who tries to steal their jewels and Cinque leads a team to catch her before she causes more trouble. 

Union Fest
Yunion Fesuta (ユニオン・フェスタ)

September 1, 2012
At last the special event featuring Biscotti, Gallete and Pastillage's armies begins. Éclair is avoiding Cinque since the cat thief incident, while Rico figures that she is in fact denying her true feelings for him and confronts her about it. Upon taking heed of the situation, Leo challenges her to a duel during the first round of the festival, claiming that Éclair cannot win against her as long as she keeps such hesitation in her heart. 

Land-Air Single Combat
Sora-Oka Ikkiuchi! (空陸一騎打ち!)

September 8, 2012
The Union Festival keeps going at full force with several one-on-one battles among key players of the three nations. Nanami challenges Brioche, while Cinque and Gaul have a duel using their Hero Crystals and Milhi has a heated aerial match with Rebecca. Seeing her country behind in the overall score, Adel decides to join the fight adopting the "secret" identity of Hero Mask. 

Change My Heart
Chenji Mai Hāto (チェンジ・マイ・ハート)

September 15, 2012
As the Union Festival goes on, Cinque and Millhi pay a visit to Yukikaze. When Millhi discovers the egg of a mystic creature, the egg hatches and both the three and the hatchling end up switching bodies. As the creature runs away in Cinque's body, the others join forces to corner it and return everyone back to normal. 

Final Stage
Fainau Sutēji (ファイナルステージ)

September 22, 2012
As the Union Festival's end approaches, so does the time for the three heroes to return home. While searching for a present to Rebecca, Couver falls into a dungeon with Rico and Noir. The three barely evade the mortal traps set around the place until the others find their location and Cinque and Rebecca rush to save them. 

Summer Memories

September 29, 2012
Cinque, Rebecca and Nanami spend the final days of their stay on Flonyard alongside their friends. The night before their departed, Cinque and Millhiore talks about the last time they parted ways, remembering how she confesses to him and how he answered back. The Princess requested to Cinque to hug him for her to remember Cinque's "warm and happy" hug. Each of them also receive from their respective rulers a special present before they are sent back to Earth, with the promise of returning in the near future. 

Season 3

# Episode title Japan original air date

Once Again, The Hero Returns
Futatabi, yūsha no kikan (再び、勇者の帰還)

January 10, 2015
The three heroes return to Flonyard but Cinque and Nanami's summoning is disrupted by a lightning bolt, leaving them stranded in a forest. While their friends search for the duo, they meet a girl named Sharu who offers them aid. 

'Dragon Priestess '
Futatabi, yūsha no kikan (再び、勇者の帰還)

January 17, 2015
Cinque and Nanami help Sharu protect the forest against hordes of rogue beasts, but after reuniting with their friends, a bigger threat appears. 

Big Battle! The Dragon Forest
Sen ke~tsu! Ryū no mori (決戦! 竜の森)

January 24, 2015
The armies of Biscotti, Gallete and Pastillage join forces to vanquish a powerful demon that threatens the forest. To help Sharu seal the demon, Cinque, Nanami and Rebecca bring their powers to the limit.

What's Passed On
Tsuga rete yuku mono (継がれてゆくもの)

January 31, 2015
With the crisis averted, the heroes return to their respective kingdoms, but when Nanami and the Genoise Trio pay a visit to Pastillage, they get into a slimy mess when some dangerous creatures break free at the castle.

Exploration at the Crystal Mines
Tanken! Kesshō kōzan! (探検! 結晶鉱山!)

February 7, 2015
Cinque and Rebecca joins a scientific expedition that turns into a dangerous adventure when a cursed creature threatens the local Fairies.

The Lion's Arranged Marriage
Shishi no o miai (獅子のお見合い)

February 14, 2015
The time has come for Leonmitchelle's annual challenge in which whoever defeats the princess earns the right to marry her, but this time, a new and powerful contestant who is an old friend of hers, appears as well.

The Little Prince and the Legendary Hero
Chīsana ōji to densetsu no eiyū (小さな王子と伝説の英雄)

February 21, 2015
After almost defeating Leonmitchelle in the challenge, Prince Leaf from the Kingdom of Halver is showed around Galette, Biscotti and Pastillage by the locals, and after attending one of Milhiore's concerts, they gather around Adel, who is about to tell them old stories of the past.

Recollection: The Story of the Hero and the Princess
Tsuioku 〜 yūsha to hime no monogatari (追憶〜勇者と姫の物語)

February 28, 2015
Adel and Valério tell Couvert and her friends their exploits to clear the land of demons along with Brioche, Isuca and Valério's long lost sister, Princess Clarifier, the one who summoned Adel to Flonyard and became her closest friend.

The Star Whale in the Sky Sea
Sora no umi no hoshi kujira (空の海の星鯨)

March 7, 2015
Upon learning that something is amiss with the Sky Priestess, Sharu seeks for the Heroes' aid and departs with them to the insides of the Star Whale, a massive flying deity where she resides.

The Sky Priestess and the Star People
Sora no miko to hoshi no tami (空の巫女と星の民)

March 14, 2015
Upon meeting the Sky Priestess, Cinque's party learns that the Star Whale is infested of demons, and the only way to cleanse it is by the voice of a talented singer. With Aria, the Sky People's songstress unable to sing, Cinque and Rebecca return to the surface seeking Milhiore's aid, but Verde, a strange enemy appears, intending to claim Aria for himself.

Song of the Stars
Hoshi no utagoe (星の歌声)

March 21, 2015
Once returning with reinforcements, Cinque joins forces with Gaul against Verde to rescue Aria, while Milhiore uses her song to heal the Sky Whale.

Returning Home
Kikyō (帰郷)

March 28, 2015
Once the Sky Whale is restored, Shinku and his friends return to the surface. Some time later, the heroes are once again sent back to Earth, promising to return to Flonyard in the near future.