My Un-Royal Princess

When a certain student in Kyoto's class ends up as the substitute teacher, temporary hell arrives. But once Kyoto discovers that She's leaving the school after that day. He wants to know why, questioning her and ending up making things awkward. He discovers she's royalty and doesn't like her betrothed. Eventually, falling in love, they try to live a normal life. But conflicts occur, when her family finds out who she's with. But she's nothing like royalty to him.