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 cafê 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!

Hare-Kon. originally ended with 187 chapters on June 17, 2019. Serialization returned on January 17, 2022 with the after story "Hare-Kon. Okawari!" The 8 Okawari! chapters were relabeled as chapters 188 through 195, and published as volume 20 of the original series.