Responses
I think he is second lead according to one of the notes by the author(?)
In the past, Seoin likes Yeongwoon first, then a teacher asks Yeongwoon to help Seoin with his study, then they become friends, hang out, Seoin suggests they mess around together as friends (mostly handjob) under the pretext of wanting to know more about gayshit because he (Seoin) might like another dude. Yeongwoon, being a doormat and also likes Seoin, agrees.
oh thank you guys ヾ(☆▽☆)
uh whats the relationship of Yeongwoon and Seo when they we're high schoolers or something? did Yeongwoon like Seo? and Did Seo like Yeongwoon in the first place or he just like Yeongwoon 'cause he's a horndog?, LASTLY is the man in the last chapter (i forgot his name) is the second male lead? so this is a love triangle? PLEASE ANSWER 'CAUSE IM CONFUSED ON WHAT'S HAPPENING