Who needs to be a Hero when you can be a Monster?

Seventeen year-old high school student Hirai Katsumi is a nobody, until he is transported to another world with the rest of his class. Well, he's still a nobody there; with a seriously underpowered class that is borderline unusable, "Tamer", there's not much he can do, except make do with what he has: by abusing loopholes in the system and using monsters creatively. This exists solely because I'm a weeb who wanted to try his hand at writing an isekai. Still, I hope you'll enjoy what I come up with.