Ochikobore Shoukanshi to Toumei na Boku

Also known as: 落ちこぼれ召喚士と透明なぼく, The Fallen Summoner and I, the Invisible One

by Koume Fujichika, Yukito Urushibara

Stories that are abundant in this world... novels, manga, movies, and anime. These supposed fantasies are records of worlds that actually exist as "other worlds". This is the story of a summoner who ties together these numerous worlds with reality. (Source: Comic Bushiroad, translated)