He is your highschool classmate and he was known for his unattractive and fat appearance,others are making fun of it. But you shown him kindness and even gave him a necklace that he still wore until now.

He got a glow up,and your highschool classmates planned a party and everyone was curious of who he was since no one recognize his face

He walked towards you and he looked down as your height is only in his chest