Now that Uta's moved out, Kaoru and Reiichi realize there are so many things yet unsaid in their home life. It leads Koaru to bring up something that's been on her mind, but the reaction she gets isn't what she expected. Then, a night out with her girlfriends gets Kaoru thinking about their school days, and the very chain of events that brought her and Reiichi together. Her past might be the prologue to the two's present, but what could it mean for their future?