Imagine being engaged to a beautiful loving billionaire, living in a posh western-style boarding house and being surrounded by sexy flatmates. Sounds like the perfect life, right? For nice guy Kaoru, it's not so easy. He has to keep his engagement to Aoi a secret, struggle with his contempt for his family and do his best to avoid tripping into the numerous boobs which surround him -- all this while under the scrutiny of Aoi's guardian, Miyabi.
