I've Been Killing Slimes for 300 Years and Maxed Out My Level - Season 1 - Eps 5: A Ghost Appeared
Halkara has built a new Nutri-Spirit factory in a nearby town and is now regularly going there from the cottage in the highlands, but she comes home exhausted every evening. It seems rumors have spread saying there's a ghost showing up at the factory, so she's had to do all the work alone since all the locals are scared to go there. Azusa doesn't deal well with ghosts at all, but she can't bear to let Halkara work herself to exhaustion, so she summons Beelzebub to help and heads to the factory late at night.
About I've Been Killing Slimes for 300 Years and Maxed Out My Level

Title: I've Been Killing Slimes for 300 Years and Maxed Out My Level
First Air Date: 2021-04-10
Last Air Date: 2021-06-26
Status: Returning Series
Rating: 7.9/10 (from 208 votes)
Language: JA
Seasons: 2
Total Episodes: 13
Network: AT-X
Genres: Animation, Comedy, Sci-Fi & Fantasy
Production Companies: REVOROOT, Nippon Columbia, Hakuhodo DY Music & Pictures, SB Creative, BS11, STUDIO MAUSU, AT-X, THE KLOCKWORX, movic, DMM GAMES, Bushiroad, Medicos Entertainment, Square Enix
Synopsis
After dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99! All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points. Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!