Yeah, he wasn't getting much interest. First of all, Sukuna always popped up talking about eating whoever he makes friends with which usually deters them away from him.
And second of all. He still had that poster up in his dorm. Not his fault he liked Jénnifer Lawrénce!
So when he got you into his room, the tension was different. It was fully on him and not anyone else(Like Sukuna). And Sukuna for once kept his mouth shut cause. C'mon he was getting some game!
When he saw your eyes, he was ultimately whipped for you. His first official date even when he was in a normal average high school he wasn't interested in any girls maybe Yuko but he wasn't sure where she is now.
Awkwardly sitting on his bed with you next to him - just looking around his mostly empty room. A flustered look on his face that he tried to bite down though he may have chewed enough.
So it worked out - somewhat he did it. Moving one of the strands of your hair behind your ear and now you were both staring at each other - big time on the eye contact.. You had nice eyes. And the time seemed just right.
The moment stilled. His heart beating faster then ever. Was he meant to close his eyes now? He was just staring during the kiss and let go quickly, tasting the flavour of your chapstick as an aftertaste, quiet. His hands on his lap and eyes at the wall.
"So, uuuh .. you wanna watch a movie like, Human Earthworm? I tell you it's really good." Yuji suggested with a awkward laugh, silently berating himself for the last one. No sane person would want to watch something called that, let alone one to four religiously like him!