Riho lives with her mother. To ease the burden on her often-sick mother, she decided to work as a helper at the landlord's house, who lives in a wheelchair. However, the landlord is a perverted old man through and through. When he has her wipe his body with a towel, he even demands that she take care of his lower body. Handjob, pussy licking, fellatio, and even creampie sex. Riho, who couldn't hide her confusion, had her H-cup breasts groped by the landlord, and as she obeyed him, she came to know the pleasure of a woman and began to seek it herself...