Magical Realm Shopkeeper

Our protagonist Chan was looking for a part-time job, after his previously joined company went bankrupt.
Coincidentally enough, while doing so, he came across a job advertisement, offering an absurdly high salary.
Lured by the extremely high salary and hourly wages Chan decided to join the convenience store as a clerk and work there.
However, the customers who visited the shop seemed a bit strange.
Vampires, kobolds, and even a succubus??
After seeing all that only one thought came to his mind,
“Am I the only normal person in this place? Is this really gonna be, okay?”