When Mr. Tsuchida dies unexpectedly, the biggest surprise comes when Rin is told that both mansions have been left to her. The gang has to return to the swamp, only to find that girls are going missing again! Can the four of them figure out what's going on? Or will the past make it too difficult to stay? Rin may find that she cannot leave.

The story of how Kim Hyun Oh meets Jinki Hidemi. Two boys who were roommates and suddenly grow as couples. Learning about each other, they will learn through problems and pain between each other. Maybe their love will grow if they stay like roommates, who knows...