Iinazuke ga Dekita to Omottara, Sono Iinazuke ga Gakkou de Yuumei na "Akuyaku Reijou" Dattan dakedo, Dou Sureba Ii?

"I have a fiancée...?"

One day, Higashikujou Hiroyuki, an ordinary high school student, is told a surprising fact by his father about an arranged engagement. His fiancée is Kiryu Ayane, the "Villainess" at school, known to everyone for her sharp tongue and coldhearted personality.