On the day he went to his friend's house for the first time, Riku fell in love with his friend's mother, Rika. Her voluptuous, busty body was incomparable to that of his classmates, and she exuded a fierce sexiness. He couldn't bring himself to say that he was interested in his friend's mother, so he made up a suitable excuse and sneaked out of the room, and went to check on Rika in high spirits. He didn't need to talk to her. He just wanted to be close to the woman he admired. He quietly opened the door and caught a glimpse of Rika's unexpected, lewd behavior.