Tong Sui travels into each world, facing various villains. These villains are known for their petty revenge, twisted psychology, and frequent dark turns, making them figures that all challengers want to avoid. Yet, the feared villains direct all their tenderness and affections toward Tong Sui. In the first world, the villain is the strongest military female of the empire but faces judgment for injuring the male protagonist, Lu Ting. On the brink of darkening, Tong Sui, as a male insect, approaches the villain. In a surprising act, the proud villain bends down, revealing a possessive madness behind his cold look. In this life, Tong Sui becomes his only faith. Other worlds include ABO dynamics, post-apocalyptic scenarios, and the entertainment industry, among others, all featuring various types of entangled relationships and challenges.

40-year-old virgin, Japanese old man, found himself waking up in a different world. When he wakes up, he found out his body become young again. With no help from anyone he spends several years becoming a s*ave and spend his days full of hardship. His life in the living hell is continued, until he meets him... This is a love story about a young man with small body in a different world that full of beastman. Volume 3 are focused on other characters beside Chikayuki, Gail and Douglas.