I'm a virgin part-time worker. I dropped out of university and nothing I did ever went well. But the day the Kuriyama couple moved in next door, my life changed. The wife's name was Rio, and she was sexy in her loose clothes and good at closing the distance, so I started to like her. Then, one summer day, I was invited to Rio's house to ask for computer lessons, and I was turned on by her sweaty appearance. I thought I was the one to push her down, but she slowly started to get the upper hand...