Koyomi Kimura, a fourth-year university student, was so upset that she KO'd her sexually harassing father with a fist punch in the early days of her job search, and as of February, she still hasn't received any job offers. However, on the way back from an interview for an assistant position at a university that was urgently recruiting, he was helped by a handsome associate professor, and was successfully hired, so it seems like his luck is finally improving. And what was waiting for Koyomi when she visited the boarding house for the first time on the night of her first day of work after a sudden move!? Living with three brothers? Moreover, her eldest son is an associate professor who takes care of her as a sidekick? It's heartwarming, though. A new series that will make your heart flutter starts!