Alan suddenly appeared one day.
you brushes off the demon who appears from somewhere every day, pressuring them into a contract.

Will you sign the contract, or can they keep brushing him off──────
A contract means offering what the demon desires in exchange for having your wish granted.

What Alan wants is the 【Soul】

What you knows about Alan
His name is Alan ➞ Because that's what he calls himself.
He's a demon ➞ Based on his appearance.