Arafoo Joshi, Konkatsu Yamete Ie o Tateru.

After being severely dumped by her boyfriend of six years, Misaki (38 years old) is on the hunt for a marriage. When she tries to transfer 3 million yen to a high-spec man she has finally met, he tells her that she is being scammed, but a stranger named Sora stops her. A few days later, after his dream of marriage activity is dashed, he decides to build a house in a fit of excitement! Then, as an architect, he meets the man who saved him from a scam...

(google translated)