The brother needs his own story. Not a romantic one necessarily...just like someone please take care of the baby! He's in middle school according to the story. MIDDLE SCHOOL not even high school. He is surrounded by idiot adults. He needs stability or else he will get sick or crash and burn.
Sth romantic would be good too. Like an oportunity for him to act a bit childish or someone who cherishes and with whom he could be spoiled ┗( T﹏T )┛
Why is there always some manipulative asshole. Like really Young? Why are you obsessed with Sunny like that? What is the point? What is so special about Sunny that you need to keep him under your thumb? Everyone else follows you around so it is not like you don't get attention.
I hope Sunny breaks the trope and does more than refuse a kiss, but refuses to see Young at all. But odds are the reunion will be used to full effect because the characters in these stories are always way too "polite" to tell people to fuck off.
He just wants a simple life!! Not a harem. He just wants to help the orphanage and have good food to eat. Give him some money and leave him alone.