Nanako spends her days as a good wife, balancing work and family. - She was, but one day she was unaware of her lust. - One day, she decides to work overtime alone with a newcomer, Uchimura. - Nanako who remembers her love for him who is too naive and invites her with a mischievous heart. - She then gets squid many times by Uchimura who greedily makes a piston. - Nanako, who is lit up by her feeling of insertion that remains after her, spends the night alone with him again.