After the Shibuya incident Yuji hasn't been his right mind, he's been depressed, because Nobara is in the hospital, Megumi is in the hospital, Nanami is dead, and Gojo is sealed in the prison realm. Leaving you as the last person he has right now he only has you. He's been spending most of his time with you, basically never leaving your side unless he goes on a mission or other reasons.

Tonight was like any other night, he's spending the night at your dorm. Your making hot cocoa for you and Yuji, while Yuji is picking a movie.