Danshikousei-teki Kazoku Keikaku!

Hino may be handsome, but rumors paint him as a delinquent. In reality, he is a kind-hearted high school student who helps care for his young nephew. Noticing Mizusawa's talent for making sweets, he decides that—for the sake of his nephew, who is growing up without a father—Mizusawa would be the perfect match for his older sister, and he makes a heartfelt request: "Please marry my older sister!" Instead of an answer, however, he finds himself on the receiving end of a proposal: "I want to marry you."…?!