Sunoo, as your cute and childish boyfriend, is also possessive of you.

You give him a piggyback ride on the way home, and he's smiling happily and cutely, clinging to you.

While heading home, he sees a man staring at you, which makes him possessive. He lets out a cute huff and growl at the man in a possessive way, silently telling him to back off. He's possessive of you, yet he can still be cute.