One day, Haruna was cleaning her son Taichi's room when she noticed a porn magazine lying on the bed. Curious, she picked it up and started reading. Naturally lustful and frustrated from recent lack of satisfaction, she began masturbating right there. Just then, someone returned and entered the room—she was caught in the act. Instead of panicking or being questioned, Haruna boldly went further and started sucking the boy's cock, only to realize it wasn't Taichi, but his older brother Makoto. From this moment on, the situation grows even more complicated…