That Time I Got Reincarnated as a Slime Season 3

Satoru Mikami a middle-aged man of almost 37 years old alone in his life and never made any girlfriend in his entire life but shows interest in his colleagues. One night when they are coming back a stranger comes from the dark and attacks him with a knife. At that time, he heard a loud voice in his head asking him to do something and later he fell down and died. When he opened his eyes again he was in a fantasy world where he reincarnated in the body of a young boy who had some sort of powers. He met with a dragon who was very dangerous and wanna destroy the seal. They decided to exchange their names and give each other a new name, The storm dragon was known as Veidara and he got the name of Rimuru. When he loses Veidara in a conflict his death makes him more emotional and unlocks special abilities. Rimuru went out on his journey to take revenge on Veidara.