Mibun sa ni Owatta Koi wo, Imasara desuga

Olivia, a princess who was sent to a neighboring country through a political marriage, finds herself isolated when the prince has an affair. She escapes from the kingdom and vows to live out her days in obscurity as a commoner. However, her past catches up with her when Gilbert, the captain of the knight order sent to find the missing princess, appears before her. He was once her personal guard, and someone for whom she once held a faint, unrequited love. His reappearance drastically changes Olivia's fate and stirs her heart once more.