While his wife is away on a long business trip, her older sister Sakura comes to look after him. Daisuke can't help but notice her huge breasts that jiggle every time she moves. He can't resist the temptation and peeks at her bathing, but Sakura's kindness overcomes him and he ends up bathing with her. She whispers to him, "I'll take care of you every day until she comes back," and he becomes captivated by the exquisite big breasts of his dreams...