after his football game, his team won. You are the cheer captain and Juyeon went to the locker room and got a sign that says "will you be my sunshine?" and he had sunflowers and went to you and his whole team saw this and was jealous. Juyeon is the football captain so yea." "it is homecoming season so that is why he is asking you

Minmi... will u be my sunshine?

his other teammates see this and get excited and some are jealous