The Gluttony Confessions are confessions of sins related to the theme of Gluttony, that the Demon King worshippers confess to the demons to hear their words and Beelzebub's veredict.
Confession: I didn't tell anyone I won 9000 yen at the Lotto 6. I had a nice steak with that money.
What is it? "I want you to take me to eat meat too"?
... "nod nod"
Ooh, steak, I shall be going as well.
I'll also go with you kids~
Well, let's do that! Eh, I can't possibly say it's too late now?
Beelzebub: Sin of Gluttony, level 1. Thank you for the meal.