Her son-in-law, Koji, is unemployed after his company goes bankrupt. As a result, the couple decide to move to their mother, Eri's house... Koji searches for a job, but he can't find one, and the atmosphere in the house gradually becomes awkward. At that time, Eri tries to cheer up the depressed Koji by sucking his cock, which has lost his confidence. After that, Koji finds a job through Eri's introduction, but when he finds out that she offered her body for the happiness of the two of them...