In the previous work, "ポテマミー", the gal who came to Nakayoshi Nursery was Mami-san, the mother of the nursery director, Mana-mama. Shortly after arriving, she spotted a cute boy, devoured him and promptly got pregnant. As a result, she ended up getting hired at Nakayoshi Nursery and became the “new” Mama sensei. Mayamama-sensei (who appeared in "ポテシスター" and "孕ませポテポテなかよしえん") was strongly opposed for some reason but after being scolded by Mayamama-sensei (who appeared in "ポテノイモコ"), she reluctantly agreed. Thus, the Mami Mama sensei was finally born and a welcome party with the grown-up baby began.