I've Been Killing Slimes for 300 Years and Maxed Out My Level Novel Volume 9 is written by Kisetsu Morita with illustrations by Benio.

I’ve been killing slimes for 300 years, and now…I’m a slime?! …I mean, just inside a pocket sandbox world, though. I’m a bit worried about getting back home, but it’ll be an adventure anyway! This time, I also get my hair cut (no, not because of a breakup), go on a little date with my daughters, and watch sports in the demon lands…sort of. Not only that, but I also get another (slime) daughter! Plus, at the end of the book, company president Halkara shares more of her foodie adventures!!