The Essence of Fairy Tail

Wandering around Purgatory, you wouldn't exactly expect to find a bar, would you? even less expected, is that the barkeep is a shadow monster offering to Isekai you with powers derived from colorful potions. Merchant King? Alright. Lets make some mone- wait. why is that girl here? she should be in the nude rock! what the hell! (Essence Fic) (Self Insert Oc) (SI) (Reincarnation)