Saigi Ou no Keiyaku Ouhi

Estella, a novice nun, is asked to marry His Majesty for a limited time for the sake of her country. However, His Majesty King Vikris, a war hero with a strong following among the people, is a "paranoid king" who is extremely distrustful of people. Will I be able to handle married life with the king, whose wariness is at its peak? This is the love story of a complicated king and a nun in training, which begins with a contractual marriage! Source: MU