The ceiling collapsed, and a girl from the second level plunged through!? Sousuke lives in a run-down apartment building, and the only consolation he has is that his landlady is a lovely woman, and the girl who lives above him is adorable. But one day, the ceiling above him creaks and... Bang! The gorgeous girl crashes down on him from the second story, exactly above him...!? Hearts and bodies are joined by happenstance in an erotic experience that can only be described as a miracle. Then, for some reason, he begins to live with both of these lovely ladies!? What will happen to this packed love triangle under this one roof...!?