[Girls attack! A new kind of omega-verse is born! --Nana Kitano, an alpha who is in the highest class of athletics, studies, family background, and appearance. Her family's custom requires her to have an arranged marriage with an omega, and her goal is to destroy the match. She wants to decide who she will marry. With this conviction, she goes to the arranged marriage venue to break up the marriage, but the person there is Kazuki Haihara, a teacher at her school. Shichi is surprised by this unexpected partner. However, she gradually becomes attracted to the teacher...? 【女子が攻める！？ 新感覚オメガバース爆誕！】――運動、勉強、家柄、容姿、すべてがハイクラスのα・北乃 七（きたの なな）。家のしきたりでΩとお見合い結婚をしなければならない彼女の目標は、縁談をぶち壊すこと。結婚相手は自分で決めたい。その信念で破談のため見合い会場へ向かうが、そこにいたのは自身の通う学校の教師・灰原 和毅（はいばら かづき）だった。まさかの相手に驚く七。しかし、だんだん先生に惹かれていき…？