![](https://pic1.mangapicgallery.com/r/avatar/c1/u307730_50x50.jpg?2)
maybe im wrong but the green haired guy (forgot the name) says something like yura didnt have this gentleman like attitude in high school he was more competitive and sometimes being a jerk so i think when mc meets with yura for the first time yura feels pressure for being good hyung who always take care of other people so yura's personality got separated. OG yura was the night hyung since the beggining. and both day and night hyung have feeling for mc but day hyung cant express that feeling and the more he get feeling for the mc the more night hyung wake up? night hyung have feeling for the mc and caught the mc red handed (he was masturbating using his shirt at the beggining right?) got the upper hand (took control of the situation) and get to s*xual relationship with the mc and trying to dominate after that all the angsty happening
their love will escalete rather quickly