I've Been Killing Slimes for 300 Years and Maxed Out My Level Manga Series by Yusuke Shiba, Kisetsu Morita, Benio

After living a painful life as an office worker, Azusa ended her short life by dying from overworking. So when she found herself reincarnated as an undying, unaging witch in a new world, she vows to spend her days stress free and as pleasantly as possible. She ekes out a living by hunting down the easiest targets - the slimes! But after centuries of doing this simple job, she's ended up with insane powers...how will she maintain her low key life now?!

The slime-slaying, max-leveled, immortal witch Azusa's main goal in reincarnation is to live a laid-back life with her new family of four. But trouble comes knocking on her door when the elf Halkara arrives, seeking sanctuary from the demon Beelzebub...Will Azusa ever find peace?!

Family, check. Trip to demon lands, check. Demon king meet and greet, che-Uh-oh. Azusa's laid-back vacation is smashed to a million pieces when Halkara smashes into the demon king-just as the Great Slime prophesied. Can Azusa clear up the misunderstanding, or will it be off with Halkara's head?

Aaaaand the secret to Falfa’s slimy condition is…she slept wrong! Good news—she can be fixed. Bad news? Only the famous slime martial artist, Fighsly, knows how! And so, Azusa’s gotta fight Fighsly…without magic! Can she pull it off?

Although Azusa’s about ready to return to her laid-back life after meeting all sorts of slimes and witches, she just can’t catch a break! Between planning mushroom parties and visiting World Trees, she’s busy, busy, busy…But a little excitement in life never hurt anyone-right?

Party at the rock fest! Will the new Kuku be a hit after tweaking her music a bit…?! Meanwhile, sparks fly when Halkara meets a serious business rival…And what’s this about a fighting contest in Flatorte’s hometown?