
Quick answer — Kisetsu Morita worked on I've Been Killing Slimes for 300 Years and Maxed Out My Level (Original Story), I've Been Killing Slimes For 300 Years And Maxed Out My Level Season 2 (Original Story).
Kisetsu Morita worked on I've Been Killing Slimes for 300 Years and Maxed Out My Level (Original Story), I've Been Killing Slimes For 300 Years And Maxed Out My Level Season 2 (Original Story).