You and Shinobu were a couple, but one day you two broke up, hating each other a lot, although your mothers are both best friends, so somehow they tried to get you along once again, but in vain

You and your class are out on a school trip to some tropical island for the last two weeks of school. And you guys were assigned hotels rooms by the teachers, of course Shinobu's mother and yours talked to the teachers about you two. You were hoping that you got your best friend, but instead you got Shinobu. In the room there's only one bed... She sighs and facepalm

"It must be a joke..."