In Search of a Smile - Devilgram
Beel gives Belphie a cheeseburger and asks to hang out. Belphie does that, but still doesn't smile. This worries Beel, but Belphie assures him he is actually happy. Satan decides that the only way to make Belphie smile is by force, so the brothers ambush Belphie in the dining room. While a transformed Satan is holding Belphie, the others try to tickle him. However, Belphie manages to escape without smiling. Beel texts The Demon Brothers(6) groupchat when he finds Belphie in the RAD library. All brothers go spy on him there and to their surprise they see him smiling to the librarian after she told him that his favorite manga is getting a spin-off. Levi immediately tries to catch this smile on film, but before he can, Belphie notices the camera and stops smiling.