Rin and Ryuji were on on a date and Lewin found out and went to the same place with Angel on a date.

Rin knows immediately what Lewin is up to and shoots him angry glares from across the room and flips him off when Ryūji isn’t looking. 

Angel and Lewin BOTH wanted to fuck with him. Angel will take any chance he can get to exact petty revenge because he still isn't a big fan of Rin for being the Antichrist.