Every day, Shinya enjoys a lustful night with married women on a matching app. In his school days, he was a dull and introverted guy, but he made a change after using a matching app. Thanks to meeting one slut after another, his sex skills have improved dramatically, and now he is on the hunt for frustrated married women. Today, he was once again matched with a high-ranking married woman and made a date to meet her at a hotel, but... It turns out that the woman is Mio, a top-tier girl from his school days. Mio also realizes that Shinya is a man at the bottom of the school caste system and starts to insult him...