In the beginning, Ren is thinking back on how he lost what he cherished the most and couldn't do anything about it. He then comes to the conclusion that it is his fate to kill Tsubaki and that he has to perish all his regrets. Likewise, Tsubaki thinks about how she has no choice but to kill all weaklings in the world if she has to live. One of these "weaklings" turns out to be Ren's lover (Lily). Ren tries to reason with Tsubaki, but she kills her anyway. Ren sinks into depression and thinks back on his childhood friend Rin and begins to think that she and Tsubaki might be the same person.