She had wanted to be a good substitute teacher, but life forced her to take a job cleaning instead. She had wanted to work both as a substitute teacher and a cleaner, but to her surprise, she became a teaching researcher. She excelled in the role, but then, unexpectedly, a stroke of good fortune came her way... She thought of him constantly, yet never dared to hope for more. Little did she know, he was deeply in love with her. She was happily married, but never expected the outside world to hold so many temptations...