In this great new game, you are the main character, living a normal high school students' life. Right before Summer Vacation you make up your mind to ask beautiful Kaho Serizawa out on a date, but the very next day you wake up to realize that summer vacation is over and he has "Day Dropped", or time-slipped, to September 1st.

Precis

Going to school in a state of confusion, you find your grief-stricken classmates who tell you that your girlfriend Kaho has died in an accident the day before.

How did you start dating Kaho, when you don't remember asking her out? And what were the tragic events that lead up to her death? As the story progresses, you continue to slip back into that fateful summer as you grapple with the awful fate that awaits Kaho-chan.

It's an adventure of a lifetime, a summer that crosses the boundaries of space and time.