Make Heroine desu ga Kekkon Shimasu: Kono Naka ni Watashi no Otto ga Iru!?
負けヒロインですが結婚します～この中に私の夫がいる!?～
In 2013, Japan addresses its declining birthrate and aging population by creating a Ministry of Marriage and a national app designed to match individuals based on genetic and personality compatibility. Reon, devastated after her best friend takes her boyfriend, registers for the app, hoping to find a new partner.