Ayano married a man with a child from a previous relationship, and the three of them began living together. She struggled to close the distance as a mother, but her relationship with her stepson Keisuke wasn't bad. Then one day, Keisuke came home from school with a serious look on his face. Worried, Ayano asked what was wrong, and he begged her, "Teach me how to kiss." Apparently, he had failed in a romantic situation. Ayano initially refused, but then decided it was a parent's duty to solve their child's problems. Gently guiding him, she said, "Mommy will teach you an adult kiss." Viewers will witness Ayano crossing the line as a mother.