I actually own a copy of this book. It's packed away somewhere right this second, but as I recall, the gist of the story from here is something to the effect of: Kasen tries various increasingly implausible ways of bringing Yoshika's memories back, and Yoshika is severely offended by it when she finds out why Kasen is spending so much time with her. She tells Kasen off for trying to force to be someone she's not instead of appreciating who she is. Finally, Kasen comes to terms with her Yoshika being gone forever, and starts over with the current Yoshika.