Lambo is beat up by Reborn as usual and is tossed into a neighboring house. The boy living there, Shoichi Irie, goes to the Sawada household to return a box that contains a gifts of thanks from the Bovino Family, the family that Lambo belongs to. But unusual things begin to happen! A beautiful woman sunbathing out of season, a talking baby, an exploding child, and a suspicious black luxury car… Shoichi Irie is confused by the strange happenings and has no chance to return the box.