Sometimes we are like stars.. We fall to make someone's wish come true.      

SM High was an All Boys School which changed to a Co-ed school when the school's owner thought it would earn more money that way. It unfortunately ended up with the students gender clash.   The only good solution they could find to end the never ending gender clash of the students was to make the them live with the opposite gender as a roommate—which of course didn't end up well in Room E10