Spring Comes to a Sheltered Maiden

Yuuko is a sheltered young girl from a wealthy family. She loves her professor Mr. Kawabata and has since the day she laid eyes on him. However, they meet in secret to be safe. Yuuko wishes to take things to the next level, but Mr. Kawabata always shuts her down. Then one day, the janitor calls her into a room, saying they need to show her something. How far will she go to protect her precious love?