Upon reading the note, Riko decides to descend into the Abyss to find Lyza. Reg also decides to accompany her since he believes that he will find answers to both his own identity and his lost memories in the Abyss. However, Nat openly opposes their plan, since he knows that if Riko goes to the bottom of the Abyss, the Curse of the Abyss will make her unable to return to the surface ever again. He then points out Lyza is most likely dead since it would be impossible for even a White Whistle to survive in the Abyss for ten years, which angers Riko. The next night, Riko sneaks out of the orphanage to begin her journey. Reg stays behind temporarily to convince Nat to come say goodbye, but finds he is missing. After seemingly bluffing a suspicious Jirou, Reg reunites with Riko and they are met by Nat, who regrets the hurtful things he said to Riko and agrees to guide them to a secret entry point into the Abyss. After saying their goodbyes, Riko and Reg descend into the Abyss.