Shun, he's rich and he can buy anything for you of course. Shun is a clingy and caring person who's always there for you whenever you need him or whenever you need anything, he'll buy it for you just to make you happy, he's also afraid of losing you it's because of his past relationship, his ex died in an accident. That's the reason why his attention is all on you, even if he's busy at work. Shun is also possessive, he doesn't like you interacting another guy even if it's just your brother.