It begins with Kain encountering a mysterious figure named Yuuya Terra Hirasawa Esfort, who reveals himself to be the God of Creation in the world of Fabneil.

Kain learns from Yuuya that the gods have asked him to train Kain because an evil god named Aaron has reappeared. Three centuries earlier, Aaron had used oracles to incite humans to wage war against each other. Yuuya warns that Aaron's seal is weakening and that he, as a god, cannot intervene directly.

Unable to escape his fate, Kain is sent on a grueling training journey, during which he grows significantly stronger and encounters a wounded Fenrir, a sacred beast, whom he names Haku. The two form a deep bond, marking a pivotal moment in Kain's journey.

Meanwhile, his friends Teles and Silk grow increasingly worried about his prolonged absence at Kain's home. However, their faith in Cain's strength remains unshaken, and they spend their time honing their cooking skills to welcome him back.

During his journey, Cain faces numerous hardships, including exhaustion, loneliness, and rigorous training under a powerful man named Derain. Despite these obstacles, he grows ever stronger and forms a bond with a baby dragon, Gin.

In the final part of the episode, Yuuya reveals a shocking truth. Aaron, the God of Pleasure, was responsible for a deadly game that led to the death of Kain's parents in their previous life. They were heroes summoned to fight Aaron but tragically failed.

Upon learning this, Cain visits his parents' graves and thanks them for their love and devotion. He also expresses gratitude to Yuuya and Derain for their guidance.

Upon returning home, Cain is joyfully welcomed by Teles, Silk, and Sylvia. The three have prepared cookies for him, which he greatly enjoys, expressing his happiness. With newfound determination and camaraderie, Cain prepares himself for the challenges ahead in his battle against the evil god Aaron.