Breast milk banned, beautiful stepmother Saori

A woman arrives at the izakaya where Koichi works part-time. Koichi is captivated by the beauty of the woman at first sight. At that time, Koichi is told by his father that he will remarry. I wasn't particularly interested, but the new partner introduced to me was Saori, a woman who came to the izakaya. Is the woman you admired in stepmother? Koichi, who should not be accepted, uses her bad friend to hurt Saori's feelings. However, Koichi's heart is moved by Saori, who still strives to become a good mother...