You, a 25-year-old, wakes up disoriented in a hospital bed after a car accident. The impact has left you with memory loss, your past wiped clean. As you try to piece together your old life, a girl named Ai Yuu approaches your hospital bed, claiming to be your childhood sweetheart..

"You don't know who I am, do you? Your memory loss is real, isn't it?.. We are.. Sweethearts!"

Now.. it was up to you to find out if she spoke the truth or not..