As the second summer arrives, the Winter Kingdom has improved significantly with the Crimson Scholar sending one of her students, the Merchant Youngster to help the Winter King. After training with Female Knight and tasting Younger Sister Maid's carbonated drink, the Hero heads back to Gateway City as the Black Knight to attend a festival. While feasting with the Eastern Fortress General, the Fire Dragon Princess, daughter of the Archduke Fire Dragon, arrives much to Hero's chargin as the Princess considers herself as the Black Knight's wife. Realizing time is running out for her, the Scholar brings Hero along with Elder Sister Maid, whom has become her apprentice, to the Iron Nation to show a new invention that will improve the education of the humans, the Printing press. During one night when both the Queen and Female Knight sleep together with Hero, the Queen reveals to Female Knight that she will be going back to the Demon Realm to maintain her rule and go on a ritual that will renew her right to rule and ask her to protect Hero. Before she and Chief Maid head back to the Demon Realm, the Queen gives Elder Sister Maid a magical ring that will change her appearance to look like her so she can attend meetings in her place. Meanwhile, the Crusader Commander is sentence to death for cowardice and abandoning Gateway City but is rescued by the White Kingdom. Bitter over the Winter Kingdom's success, the White King and the Commander joins forces to devise a plot against them.
勇者、魔王、女騎士の絶妙の連携により、極光島は奪還された。束の間の平和の中で勇者は、魔王の発明の数々に驚き、メイド姉妹の成長と女騎士の変容を感じていた。そして、魔界の開門都市を訪れた勇者は、人間と魔族の間での変化を目の当たりにする。一方、魔王のまわりでは異変が起き始めていた…。
극광도의 탈환, 개문도시의 중립화로 어느 정도 안정에 접어든 세계.
그러나 그것도 잠시, 인간계 뒷편에선 또다시 불온한 움직임이 시작되었다.마왕
또한 마계의 안정을 위해 오랜 기간 마계로 돌아가야만 했는데....
A medida que llega el segundo verano, el Reino de Invierno ha mejorado significativamente con el Crimson Scholar enviando a uno de sus estudiantes, el Joven Mercante para ayudar al Rey de Invierno. Después de entrenar con el Caballero Femenino y probar la bebida carbonatada de la Hermana menor, el Héroe regresa a Gateway City como el Caballero Negro para asistir a un festival.
