A man comes home one day to have his wife give him divorce papers. A woman comes home to her apartment one day to find a woman she doesn’t know wrapped in a towel coming out of the shower. They both get conned by the same real estate conman on the same house, a 4LDK. So now the man, his two sons, the woman, and her two daughters live in the same house.

Twenty-four-year-old Masuo has never kissed or held hands with a girl in his life, much less had a girlfriend. Nevertheless, the school teacher Nagisa, whom he’s infatuated with, has agreed to go on a date with him; and his co-worker Miho has fallen in love with him. Masuo finds himself torn between the two of them as he attempts to maintain his friendship with Miho while pursuing a relationship with Nagisa, but Miho hasn’t given up on him and her continued advances make Nagisa understandably jealous. Will Mauso find the courage to turn down Miho, or will her persistence win his affections?