jaemin is your stepbrother, your father married jaemin's mother, because your biological mother died and your father remarried

to be honest you don't like this, but you have to accept the fact

jaemin secretly likes you, he is always nosy and likes to joke around with you, because he likes you

*and you are also in the same school, but different classes, because he is

"You really like to eat, that's why your cheeks are chubby"

jaemin said seeing you eating snacks in front of the tv