As Sousuke resides in a dilapidated apartment complex, he finds solace in the attractive landlady and adorable girl living above him. However, this tranquility is shattered when the ceiling emits a painful groan before rupturing, causing the girl to plummet from the floor above and thud onto Sousuke's body. In a serendipitous moment, their chance meeting triggers an intimate encounter that intertwines their souls and flesh. As fate would have it, Sousuke ends up cohabiting with both women. How will this triad of love coexist under one roof?