12 titles recommended if you like Parallel World Pharmacy
I Was Reincarnated as the 7th Prince so I Can Take My Time Perfecting My Magical Ability
The Saint's Magic Power Is Omnipotent
The Faraway Paladin
Dead Mount Death Play
The Aristocrat's Otherworldly Adventure: Serving Gods Who Go Too Far
The 8th Son? Are You Kidding Me?
Summoned to Another World for a Second Time
Didn't I Say to Make My Abilities Average in the Next Life?!
Handyman Saitou in Another World
The Water Magician
The Eminence in Shadow
The Slime Diaries