Kouman JK Kaichou Nakadashi Nikki

At the newly enrolled academy, [Shouichi Miyata] reunites with [Kirara Shindou], a former acquaintance and his first love. Kirara, who had immediately become the student council president upon enrollment, was admired by Shouichi as an outstanding and exemplary student. However, one day, he was summoned to the student council room. Shouichi went to meet her being slightly excited about their long-awaited reunion. But Kirara, with a condescending attitude, told him, "It's unpleasant to think that I once associated with a commoner like you. So, never speak of it to anyone," and even declared that she would have him monitored. Devastated by having his precious memories outright denied, Shouichi couldn't forgive Kirara. He vowed to fill that arrogant woman's body with his cum and make her submit to him completely. [Translated from dlsite]