Suika wa Shoushika Tantou

In the year 20XX, Japan is in decline because of falling birth rates. To prevent Japan from dying out, it is decided that girls who have reached a determined age would be allocated to single men. "Please make a baby with me..." says Suika, a girl who is shy but has a strong sense of responsibility, to Hedeki, a disappointing recluse who aspired to be a novelist. Under this unprecedented national policy, the two begin their stimulating life together!

(Source: Square-Enix, translated)