That Time I Got Reincarnated as a Slime

Mikami Satoru — a thirty-seven-year-old salaryman with no girlfriend and a quietly unremarkable life — dies the way nobody plans to: random stabbing in a Tokyo street. He wakes up in a fantasy world reborn as a slime, the most disregarded monster in any bestiary.

Except this slime has Predator (devour anything, absorb its skills) and Great Sage (a calm voice in his head doing the math). Renaming himself Rimuru Tempest, he stumbles into friendships with the dragon Veldora, an orc village, and a kobold tribe — and slowly turns a forgotten corner of the wilderness into a monster nation strong enough to scare every kingdom that ever dismissed slimes.