When Yurika was 20 years old, Masaharu was born. Her partner disappeared soon after, leaving Yurika to raise Masaharu alone. Growing up close in age, the two developed an exceptionally strong bond, spending nearly all their time together—shopping, traveling, and sharing countless moments. To outsiders, they appeared more like best friends than mother and son. Yet within Masaharu's heart, forbidden feelings for Yurika quietly bloomed, and the day he would finally confess them was fast approaching.