Harukazedori ni, Tomarigi o.

The main character is a high school student. One year ago, he fell in love with a female teacher. But, they were forced to break up, and he moved to a new high school. He now lives a peaceful life, gradually forgetting his past memories... One day, Harune, his cousin, tells him, "I love you. I can't stop thinking about you..." His stopped clock begins to run again...