Keiyaku Kekkon Hajimemashita.: Tsubaki Yashiki no Nise Fuufu

Located in Kotobuki-cho is the house commonly known as "Tsubaki Yashiki." Shuichi lives there, and because he's retired at a young age, he's known as the "Young Retired." Nineteen-year-old Kasumi has married him. But there's a secret. They're a fake couple, married out of mutual benefit. Shuichi, the town's advisor, is often approached by neighbors seeking advice—a story of people with hidden secrets, told through the lens of the house.

(Source: Shueisha, translated)