Because Junseo is Jaewon's friend and most important his love confident, but to fit the second role we need to know what is his past, and how he struggle to live until now (this is his major deference with orange hair) Besides is not uncommon that the love interst remains as an mystery not only for MC but to readers as well.
Other than that people just followed the cliché in BL, where at this point it would be obvious that Jaewon changed his feeling to Junseo, but in this story Jaewon has always expressed his feeling towards Karam.
That’s why I’ve stop reading this yaoi, there are too many people in love with the MC and they genuinely are.
Mostly Junseo.
And whyy does the MC always blush like that, even him doesn’t know who he will end up with
yes! thank you! i keep looking the raws to see if a second story about him pops up but nothing. It maybe be cliche to some people but it seems unfinished and half assed like this. Since you give so much time to one character give him a proper ending, not necessarily a partner but a fucking CLOSURE!
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I've accepted that JaewonXKaram is end game, but why did the author put so much effort into Junseo? She even had a whole flashback arc to fill out his character. In fact, he's more fleshed out that Jaewon is.
Why put all that effort into Junseo if he wasn't the main love interest? At the very least, Junseo deserves a happy ending/spin-off because all fans (whether they root for Karam or not) have become invested in Junseo.