Help finding this manhwa

Don’t really remember the story but the MC has a baby faced with big muscular physique. He had prior experience with women and he had his first time with the female lead (forgot if it’s a drunk ONS). Can’t remember what the fl looks like but she might be older than him.

Later on there is a scene where he started to cry and ran off. While he’s running off his clothes got stuck on something (think it was a tree branch) and his clothes got ripped off and he was left with his red underpants but he did not noticed just continue running while crying.