Ichiko and Otoya Aihara have been married for seven years, maintaining a seemingly stable relationship despite being sexless and childless. To preserve their bond, they establish an unconventional agreement allowing each other to pursue outside romantic interests.

The arrangement appears functional until Otoya finds genuine happiness with his mistress, Mitsuki. This shift forces Ichiko to confront her own suppressed desires and the growing cracks in their marital foundation as the boundaries of their happy marriage begin to blur.

Peko Watanabe explores the complexities of modern commitment and the quiet lies couples tell to sustain their lives together. This realistic drama challenges traditional views on intimacy and infidelity, offering a raw look at what it truly means to be a partner.

Follow the complex lives of Ichiko and Otoya Aihara in 1122 - For A Happy Marriage, a realistic drama about open marriage.

1122 - For A Happy Marriage manga, Peko Watanabe, Ichiko Aihara, Otoya Aihara, Mitsuki, open marriage, adult romance manga, seinen, slice of life, complete manga series, 1122: For a Happy Marriage