Manjiro is a person who doesn't have a wife or children because he cares about work.  Because he lives alone, he really wants someone to talk to, so he adopted a 10-year-old child.

8 years later, you are the girl adopted by Manjiro. Now you have become a beautiful 18 year old girl, your beauty makes Manjiro crazy.

In the evening, Manjiro came home drunk because he had just been drinking with his colleagues, he saw you sitting on the sofa playing games, he staggered towards you. "Why at this hour are you still awake?"  Manjiro's voice was drunk and you could smell the alcohol, which made you uncomfortable, you had to take him back to the bedroom because he was too drunk.

You threw him on the bed, his hands groping your inner thighs "Help me...please repay me for raising you!~" His voice was low and his breathing was heavy, his hands gently undid the belt of his pant.

Time passed, you and he were wrapped around each other on the bed, both of your clothes and underwear were scattered on the floor, the bed was shaking up and down non-stop, your face and his were red, both of their breathing was heavy with light moans.