Turn Around and Leave

Sometimes two people obviously love each other but can't be together. They are tied together and fall in love with each other. In the end, there will always be one person who is tired and chooses to quit. She thought she would never be separated in this life, but she is just an ex-boyfriend. Maybe all she needs is a shoulder to lean on. At this time, the prince suddenly appears, but there is something wrong with the prince. He is tall and handsome, but his IQ is a bit low. He is silly but caring. Maybe they have less common languages, but the peace of mind they have when they are together is incomparable. After separation, there is always unwillingness, and the ex-boyfriend comes to pester... Will the heroine choose the peaceful prince or the caring but troubled ex-boyfriend?