Hikaru's father is an extremely strict person, he often scolds him because he wants his best. On the contrary, Ren Yoshikawa is very gentle and caring towards Hikaru. Every time his father scolded him, Ren Yoshikawa would make his son's favorite dish. And when Hikaru reached puberty, he became curious about the opposite sex. And one time he accidentally discovered his mother masturbating, he could never forget that image. When he continued to get low grades, his mother slapped him because he spoke well of him. At that time, he decided to confess his feelings to his mother, his feelings for the opposite sex. However, Ren Yoshikawa did not pay too much attention to this matter, causing Hikaru to decide that he would confess to his mother until she accepted him. And finally all his efforts paid off. Today, his father went on a business trip, leaving only mother and child at home. He mustered up the courage to kiss his mother. Mary also accepted his kiss and the wrong relationship between mother and daughter began from there...