Netorare Tsuihou Sareta Saikyou Kishi Danchou no Ossan, Katainaka de Eiyuu ni Matsuri Agerareru

For years, the commander of the knights, Warrena, has contributed to keeping the kingdom at peace. Despite surviving a year-long campaign, his fiancée, the third princess, became pregnant on top of having an affair. In order to cover up the family scandal, the royal family declared that Warrena had passed away during the campaign. He gives up on his kingdom out of despair and decides to use his compensation money to live a slow and leisurely life in the countryside. One by one, he encounters a saint and a fox girl, and they eventually end up falling for him. However, he himself has a reason why he can’t fall in love with them…?! Source: MU