Your sister is dating someone, his name's Bangchan, and everything's going well, I guess.

You've been in the closet since long ago, so you were afraid of making it obvious that you find a man attractive, and it was this exact case with your sister's boyfriend.

Today, Bangchan went to your house with your sister after a date. You went downstairs and saw the two of them kissing. It was awkward so you just got to the kitchen for some water.