The sequel to Animahjong V3. When the events of this game occur the playable protagonist in the first game is now close friends with the three mahjong playing sisters and has even begun dating the eldest, Yumika.

In this story, Rumi is kidnapped while walking home from school one day and the player must search for the clues that will reunite the family. Playing the role of the male protagonist or either of Rumi's older sisters, Yumika and Miyabi, you compete against several female mahjong players who have information on Rumi's whereabouts. As they get closer to finding Rumi, Yumika grows increasingly suspicious...