GOD youre so right!! i can picture him normally slinking off when his brother has a friend over, because he and his brother don’t have a ton of the same interests so why would jisung really jive with his friends? but chan is different. chan loves music and the same silly anime and romcoms that jisung does, and he’s good at everything and kind to a fault and not to mention handsome. and then one day, they get caught in the rain just before they get home, and chan peels his shirt off over his head right as jisung’s brother is offering to find him something dry to wear, and jisung is left, mouth agape, trying to get ahold of his expression before his brother comes back into the room. and chan just giggles and grins, tosses jisung a cheeky wink and says nothing, turns his back (which is somehow even more gorgeous than the front) and follows off after jisung’s brother.

and if jisung ends up bent over his own kitchen counter late at night while his brother is sleeping well then thats his business