Mami Nanami is a cute college student who dumped her third boyfriend. However, she realized that she had developped a unique feeling toward him. Feeling down in the dumps, she decides to go back in her memories to know why she likes about him. From her childhood, to the start of the main fanmanga about the final chapters of Kanojo, Okarishimasu. But, what will we learn about the mysterious Mami-chan?