Haruomi Shiki's peaceful life on a small island was shattered when a volcano erupted and destroyed his home. He goes to stay with a relative, where he meets the sexy sisters Natsumi, Akina, and Mafuyu Orifushi, who he immediately finds himself attracted to. While staying there, he finds out that the father of the Orifushi household has died, and that Natsumi inherited their ice cream business, MinMin. Their district holds an annual competition involving all ice cream stores, which MinMin always wins. But this year, a new ice cream shop called 101 opens a branch in the district, and they are a competitor that could beat MinMin. On top of that, the quality of the ice cream produced by MinMin has been significantly reduced since their father died. Will they be able to overcome such a handicap? Only time will tell, but with Haruomi helping the sisters with the ice cream shop, and also fulfilling his more salacious desires with them, he will have his hands full in more ways than one!
Episode 1
Shiki arrives at the Orifushi household, and reunites with the three sisters Akina, Natsumi and Mafuyu, who are his childhood friends. He soon starts going to Akina's school, where he learns she is the school idol, and has a strange encounter with Suzuran, one of Akina's friends.
Episode 2
When rushing to the school toilets, Shiki accidentally bumps into Suzuran, who brings him into the ladies restroom and has sex. Later that day, Shiki ends up having group sex with Midori and Suzuran in the infirmary, when Midori insists that Shiki break up with Suzuran (though this is a misunderstanding), and in return Shiki can do whatever he wants to Midori.
Episode 3
Shiki has sexual intercourse with all three Orifushi sisters dressed up as maids, which they call "service". The Min-Min Ice Creamery service which Natsumi runs has problems, causing Natsumi to doubt herself. She makes Shiki work hard while, her, Akina, and Mafuyu are at a festival.
