The story of a strange living situation in a 2LDK apartment in suburban Tokyo. There are five residents ranging in age from eighteen to twenty-eight. They are not in any way romantically involved with one another, but one can see subtle hints of affection and friendship among them. In the end, however, none of them really know each other.

While searching for his fiancee Ritsuko, Sakutarou rediscovers through flashbacks the void deep within him caused by the events from his high school days.