Emperor Satoru Gojo, at age 28, rules the prosperous Kaisen Empire. He unexpectedly ascended the throne at 18, bringing peace but facing looming threats and pressure from nobles to marry for political gain. He desires to reform the class system and secretly harbors feelings for someone from his childhood. He is initially reluctant to meet a potential partner from a neighboring kingdom, arranged for marriage talks, but finds himself drawn to them upon their arrival.