Season 1

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Sudou dreams of finding a partner and starting a family. To achieve this, he joins a government-approved school club that promotes conception and motherhood among students. In this club, Sudou must choose between two girls interested in him, Umi Toono and Aika Asaki, during a one-week trial period where he has to make love to each of them on alternating days to assess their compatibility. As he develops feelings for both, Sudou faces a dilemma, wanting to make them both happy without hurting either of them, while time runs out.