My ex-boyfriend, whom I broke up with five years ago, was still in the back of Kokoro. Still, I was satisfied with my current life... and I even had a wonderful boyfriend who was too good for me. We had already said goodbye to each other's parents, and on a summer day when I was thinking about moving on, I happened to meet my ex-boyfriend. Since then, I was somewhere in the middle of nowhere, and all I could think about was my ex-boyfriend... At that time, I received an email on my cell phone. The sender was my ex-boyfriend.