The Support Ate it All - Chapter 1: Reincarnation Quest ()

Reiji Saeki, who lives in the north eastern countryside town, lost his life in an accident during summer vacation. ……But before he knew it, a mysterious ball of light hovered in front of his eyes in a world of whiteness. That ball of light was a magician from a parallel world, and is looking for a person qualified to inherit the magic they had created to prevent it from being lost. Reiji, who rode on that suggestion, now lives in the parallel world Elgin, with a new body and powerful magical power.

Gawain is dead and was transmigrated, but there was a slight problem during the process.
After floating for more than a hundred thousand years on a different continent, he felt that he might need a body to become a complete transmigrator, but he did not expect that…

- Description from Novelupdates

My lover has always been a little pitiful, but he will eventually turn into a big BOSS;

My lover has always been in love with me at first sight, but I also think he is very pleasing to the eye.

My lover has always been jealous, but I didn’t know what he’s jealous of. It is really troubling.

My lover has always had two faces; the face he shows others and the one he shows me which are completely different. It’s very confusing…

Bai Duan: This is my life. ╮(╯▽╰)╭

- Description from Novelupdates