Rim, her best friends since childhood, Chikara and Hiroki, have recently started to strongly perceive each other as members of the opposite sex. Rim also begins to notice both boys as potential romantic interests, especially because their parents are away. Despite having a tacit agreement not to rush things regarding Rim, Chikara and Hiroki can't help but fantasize about her. Meanwhile, Rim grows increasingly frustrated that she cannot seduce them despite being eager to explore sexual experiences. Note: The contents may vary depending on the distribution method used.

今も昔も仲が良い3人だが、りむを異性として強く意識し始める智樹、紘一。りむも2人を異性として意識し、両親がいないので遊びにきてと、二人を誘う。そんな智樹と紘一だが、りむに関しては抜け駆けしないという暗黙の了解があった。しかし、りむはエッチなことに興味津々で、智樹達に襲われたいが手を出してもらえないことに苛立ちを感じていた。※ 配信方法によって収録内容が異なる場合があります。