What would life be like when you are a grown-up older brother and a mischievous younger sister? Both of their parents have been working abroad for a long time. And they only come back to their hometown a few times a year. So, you will have to stay in Japan and take care of your little sister. But a few years have passed, and she has become a lovely elementary school girl. A Lovey-Dovey Sex Life With My Spoiled Little Sister tells the story of the daily life of a young man and his little sister. During the vacation, the two had fun moments together. It is a beautiful memory of both of them in a gentle and relaxing life.