A fire happens in the girl’s locker room. Fortunately, Min-ho and Beom is able to rescue the girls in there in time, becoming heroes at school. But as time goes by, things don’t go as they expected. The toilet in the bathroom of Soon-jae’s house is clogged. Surprisingly, the person responsible for it is Hae-mi, who always seems so perfect. Mun-hee is unable to control her laughs when she finds out about this and tries to tell all the other family members about it.