On the app called FreeFriends, he met Saki Kawasaki, a woman short of money due to a family change. On the train, he encountered Kotonoha Katsura, a cowardly girl who was bullied at school. He became a model and met Kirino Kousaka, a girl who loved the anime. From that month on, Yuu Kasugano's youth was no longer normal.

Lan Si, who was sent flying by the Supreme Hundred-Ton King to save someone, embarked on a journey across alternate worlds. However, he discovered that he was the only one who had transmigrated into a dragon, earning the new name Acharion Verminax Pantocratol and joining a happy family of quasi-DND true dragons. Then, in this snowy land where animals had vanished, plants had frozen, and only the endless silence and cold remained, practically a forbidden zone for life, he had to live a miserable life, eating dirt every day.

But the other Lan Si had transmigrated into beautiful girls! Their plight seemed no better than his. Lan Si, who had transmigrated into Ying, was sealed away by the law of nature, but she woke up within it... Lan Si, who had transmigrated into Altria, was destined to become the doomed King of Britain. It seemed that no matter what she did, the future was unchangeable. Lan Si, who had transmigrated into a beautiful white-haired, red-eyed undead girl, was imprisoned in the Undead Asylum, with no one to give her the key? She was going to be imprisoned like this until the world was destroyed...

None of this mattered. Acharion Wilminax Pantocratol Lansi believed that with his own strength, he and the other Lansi could all live happily ever after, sleeping together in the same bed! !