Kosaku is staying with his older brother Koichi and his wife. This year is his third year of prep school entrance exams. In his sad youth, going back and forth between prep school and his study room every day, he had only one purpose in life. That was to peek into his older brother and his wife's bedroom... As he peeks from the storeroom next door, he begins to want to embrace his sister-in-law Misako, even though it's absolutely forbidden...

A woman who graduated from a women's college and is now working as a member of society. She is living with a man she started dating when she was a college student three years ago, but the novelty has worn off for both of them and they have become completely stale. Sex is not exciting at all. Just when she wonders if it's over, she receives a letter from a friend from back then. When she opens it, there is a photo from back then enclosed. She begins to reminisce about why we used to have so much fun back then, and a scene from three years ago appears...