Shuumatsu no Hanayome-sama: Sweet Home†Melty Life

The story begins when Hikari, an older neighbor girl, suddenly proposes to the boy Michiru, "Please marry me!" Michiru knew that Hikari was looking to get married, but had no idea that the object of her affections would be him, runs away in bewilderment. Michiru has feelings for her, but his complicated family environment gives him a negative image of marriage. A story of a boy seeking love and salvation unfolds.

(Source: Natalie, translated)