Sudou, a shy otaku often dismissed by the aloof Toono Umi, is surprised to find himself recruited into the "Babymaking Impregnation Club." To his shock, he discovers that Umi secretly harbors deep feelings for him, leading the two to share an intimate encounter as she expresses her desire to conceive his child.
Sudo begins his practical training with the popular Asaki-san, who openly expresses her deep desire to conceive a child with him. After an intense intimate encounter where Sudo applies his lessons on female pleasure, he is faced with a difficult decision regarding which girl to choose. Ultimately, Sudo decides to accept both Asaki and Tono as his partners, establishing an unconventional family with the club's approval.