Thief vs. Detective - Devilgram
"So there was an ulterior mo..."
After Beelzebub finishes his food, he and MC head to the underground tomb. No one is there, which leads Beel to believe it's a trap. As he grabs the tear, Detective Satan appears to stop him. Beel throws Satan the tear, remarking that he's decided to steal MC instead. He gets away with his signature catchphrase, and asks MC why they chose to stay with him. It is revealed that the diamond Beel tossed Satan was a fake, and that MC was only posing as The Great Detective in order to steal the diamond for themselves. He gives MC the diamond, and MC has the opportunity to hug him, kiss him, or shake his hand before becoming Phantom Thief partners in crime.