A Trip for 7: Part 1 (S01E10)

Belphegor wakes up uncharacteristically early one morning only to find his brothers still in bed. Learning that they were up all night playing cards without him, Belphegor fears that they are avoiding him. To mend his twin's broken heart and bring his brothers together, Beelzebub sets out on a quest to chow down on ice cream. (Crunchyroll)