The man Koharu loved wasn’t cheating on her…he was cheating on his wife with her! And not only that…he was the third guy in a row to do so. Dejected, she leaves Tokyo for her hometown, and rejects a future of love and marriage for a simpler life. But things have changed—her parents are struggling, the café they ran is closed, and a creepy man keeps following her around. She thinks this may be it for her, until she learns that her hometown has allowed polygamous marriage, and she’s in that man’s sights as his third wife!
Meet Koharu, Mrs. Date number three! Provoked by her husband's constant needling, Koharu rises to the occasion and uncharacteristically bursts into the bath with him, where (surprising no one), Ryunosuke wastes no time calling her for her self-serving attitude. When a sudden revelation about their shared past together exposes Koharu to her husband's deranged definition of devotion, she finally makes up her mind to ditch the family for good!