Chun Yuanyou was the son of a family of doctors in his previous life. The Ghost King maliciously turned him into a ghost, but unexpectedly, he retained his memories and emotions and was adopted by the Tokai family.
Unfortunately, life is unpredictable. The Tokai family was brought down by a rival, and his adoptive parents and eldest brother were killed. Only the youngest, Lian'ou, managed to escape under You's protection.
The rival kept sending people after them, and then Lian'ou suddenly came down with a high fever. As he hid in a ruined temple and prayed to the gods, a familiar figure showed up.
You: Damn it, why is the Ghost King Muzan here again???
Muzan: A ghost who retained his emotions and memories, hasn't eaten anyone, and is even protecting people? Hah, that's interesting. Let me give you more of my blood!
You grew stronger, but lost his memories. Lian'ou was saved, only to discover his second brother's secret: he was a murderer. The brothers became enemies, and in the end, You willingly died at his younger brother's hands.
But why isn't it over yet?
Feeling the warm sunlight on his body, You was dumbfounded. Had he acquired the special constitution his boss had been searching for all these years?
Not only that, his body had also become smaller.
After accidentally rescuing a young master who'd been kidnapped in the wilderness, You was forced to accept financial support and moved into a manor.
You: Fine, I guess this is basically adoption. It's not my first time, after all. I'm used to it.
Once they got to know each other, the young master insisted on taking him back to their home country to play tennis and win first place in the National Tournament. You agreed to return, but said he would pass on the tennis. He'd rather study medicine.
But become your boyfriend? He could probably agree to that!
Theme: A kindness as great as a spring should be repaid with one's life.
