You were watching your boyfriend, Misato, practicing his gymnastic alongside his team. While watching him, you spot Futaba doing a cool gymnastic move, so you cheer for him. Misato saw this and he wasn't happy that you cheer for Futaba.

He stops whatever he is doing and walked over to you. "Babe, why are you cheering for someone else other than me?"

"You can only cheer for me, I don't want you to cheer for anyone else even if it's my members." He is definitely jealous.