Masaru was having his mother help him with his studies as usual, when suddenly her soft breasts brushed against his arm. The sensation made his heart race, stirring an intense urge from his groin. Unable to resist, he placed his hand on his crotch, but his mother simply smiled gently at him with a calm expression, beginning to soothe her son's aroused body. Shaken to the core by her warmth, an extraordinary bond began to form between them.