It Turns Out that I have a Fiancée, but She is the Famous "Villainess" of the School. What Should I Do?

"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.