In his student days, Yuya became uninterested in women after being dumped by his girlfriend. Just then, his mother's friend and marriage counselor, Mai, visited their home... Upon reuniting with his past love interest, Yuya felt his heart race. That night, under the influence of alcohol, they had a relationship. Although Mai felt guilty, she indulged in this secret tryst... The two continued to secretly repeat these hidden affairs. However, Mai began to worry about his future, as he was younger than her son.
