My cousin came to visit me at my house where I live alone. She said she wanted to stay while her parents were away on a trip. Through a strange turn of events, I started living with a teenage high school girl. When I met my cousin for the first time in a while, she was very cute, had big breasts, and had grown into a woman. This is a record of my precious memories of the dreamlike time I spent with my cousin, awake and asleep, for three days during spring break.