PROBLEM TO BE SOLVED: To provide a house with a marriage support service for a single person to enter the housing market by selling a "house with a marriage support service" to a single customer by a housing company. SOLUTION: By selling "a house with a marriage support service" to a single customer, a housing company has the intention and ability to acquire a house, but postpones the acquisition time until marriage. It is characterized by eliminating the obstacles to customers, increasing purchasing motivation, developing customer attraction, sales, and contracts in an advantageous manner, and promoting sales. [Selection diagram] Fig. 1
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