Artist: Mikagami Hiyori
Title: 幻想ニ至ル病
Gallery: https://e-hentai.org/g/683299/b83ce561c5
An English translation by "Don't Think, Look!" is available for free on Pixiv.
Chronology:
Kaikou ni Itaru Kioku (Episode III)
Shuuen ni Itaru Keifu (Episode II)
Gensou ni Itaru Yamai (Episode I)
Gensou ni Itaru Tabiji (Episode IV)
GnIT - Tabiji no Hate (Last Episode)
