While attending a Tokyo prep school, I stay with my older brother and his wife. Whenever he is away, my sister-in-law distracts me from studying by going braless and deliberately flashing her beautiful breasts. One day she approaches me with a troubled expression and says she needs to discuss something. Her braless seduction hides a request that could betray my brother: she wants me to impregnate her, and is ready to accept repeated creampies as a substitute for him.