The protagonist, Katsuragi Nozomi, is being taken care of by his kind maid, Saionji Hinano, while his busy parents are away on a business trip. His carefree aunt, Igarashi Ayano, also visits often, and both women dote on him. One day, Nozomi watches an anime DVD in his parents' bedroom and sees his mother in a shocking scene of intimacy with his father, causing him to ejaculate. After this incident, his relationships with Hinano and Ayano start to change, and Nozomi tries to become a better man with their guidance.