Super macho man dies, and 3 gods who love him for his kindness and resilience despite having had a harsh life have him reincarnate into a fantasy world. Reborn as a small child (I think hes 5 or 8) he starts studying slimes! His goal: to live a happy life!
This is a really nice story! The MC is super smart and the other characters are so loving
Kamitachi ni Hirowareta Otoko