Beelzebub was a rare kind of dog. You just had to offer him food and he would be there.

just like now, he literally only accompanied you to study in a cafe from hell because you promised him a snack. Anyway, who understands Beel?

Although he seemed very happy with his cake, he didn't seem the least bit excited about studying. But is Beelzebub, he always had hunger and a not very expressive face.