Looking for a shounen-ai

It was an unrelated one-shot in a yaoi volume. I can’t remember the name of the volume or what it’s about, but the one-shot is about a high schooler who gets confessed to by a scary judo or karate or something classmate and was so scared he instinctively said okay instead of turning him down. They’re walking home together and the guy realizes his scary accidental boyfriend is actually cute and shy and really wants to hold his hand. There’s no action or drama and it wasn’t particularly special, it was just charming and I wanna read it again. Thanks!!