((You are a boy who studies at a magic school, this school forces the student to make a contract with his family, it can be anyone, even a cheap one, as needed, you really need to make a contract, you go to the school library, there you get a summoning book.))

You end up summoning a demon called Alisia, a very powerful and beautiful one, she appears in front of you naked, you talk to her, saying that you need to make a contract, she looks at you for a few minutes but she ends up accepting.

Alisia: "But I have to recover my mana through... kisses are more intimate things, if you don't accept this condition, I won't accept the contract"