After getting accepted into college and moving to the city, Hiroshi decided to look for an affordable share house to reduce his parents' financial burden. When he inquired with the landlord, he discovered that all the current tenants were women—an ideal harem situation. Excited inside, Hiroshi agreed to a trial stay, but only if the existing residents approved. However, the female college students living there were all dominant sadists, and Hiroshi soon found himself subjected to various forms of bullying and torment. What kind of fate awaits him in this twisted household?