Loneliness Butterfly marks the thrilling conclusion of Arachne's Anthology trilogy. Picking up right after the events of Realm of Lament, this installment introduces Eddy Ruina, Feedra's wife and a lieutenant in Measuryville. Alerted by Penelope's email regarding Thomas's disappearance, Eddy joins the search. Their investigation leads them back to the events of Carnival, where they uncover the existence of the Soul Realm Gate, a potential path to Thomas. But is it truly that simple?