Sakanahen

High schooler Kazuya Endo is hit by a car one day, only to wake up reincarnated in another world as Shin, the eldest son of a marquis family! Upon turning five, Shin receives a special ability known as a blessing from the gods… but it turns out to be F-rank 《Tame》, the absolute lowest tier. With a skill this weak, the only thing he can command is trash-tier slimes. Branded a failure, Shin is banished from his household. Undeterred, he resolves to live freely as an adventurer by commanding slimes in massive numbers, growing stronger by the day, a super satisfying fantasy tale of a despised noble rising to the top through quantity over quality!