Kanojo no Ura Sekai: Akiko Side

Other name: 彼女のウラ世界＜AKIKO SIDE＞ , Her Hidden World , Her Hidden Story

Synopsis:

Toshiro proposes to his girlfriend of three years, Akiko, but Akiko disappears the next day, leaving the engagement ring behind. This story is split into two perspectives: Toshiro tracking down his vanished fiancée , and the truth behind Akiko’s “hidden world”.