Searching for Kibutsuji Hongxue [Demon Slayer/Jujutsu Kaisen]

Hongxue wasn't named Hongxue because the red plum blossoms planted in the courtyard bloomed when he was born, nor because a pregnant woman's blood stained the cold, twisted winter. He was named Hongxue because on the day he was born, crimson snowflakes fell like raindrops.

Hongxue's first life ended in the words of his brothers. From then on, his endless cycle of reincarnation began.

The Heian-kyo arc: How to teach Sukuna-chan to become an excellent chef!

The protagonist is unbelievably clueless, with an invincible buff thrown in.

I'll add more as I go. No matter which world he ends up in, he's going to work hard!

Theme: The true meaning of existing in this world is called finding happiness.