Can someone explain the plot

I don't thinn so, not much of a heavy plot tbh. mc gets sexually/romantically involved with neighbour/college kid who's watching his old heartbreak video. his sunbae/coworker is an old flame, a misunderstanding separated them as lovers. now sunbae is trying to move on but is still hung up on mc and now that mc actually has someone again he's jealous and tries to separate them. mc starts liking college kid. so far it's just this. it's a light hearted comedy webtoon with a bit of angst. I don't think it'll get any deeper than that plot wise.

think*