Wataru Rei

Fans of Fate/Grand Order—rejoice! A new side story appears...with all the twists and turns you might expect! Epic of Remnant is here!

Naeko is a girl that dreams of becoming a novelist, until one day, she awakens in a strange world! What zany adventures await our plucky heroine?

While she's patrolling the ruins of the housing complex where her father died years ago, high-schooler Himeji encounters a young man who claims to be from hell. The man, Yumeji, is apparently part of a new program, which has been started to solve the problem of hell having been filled up. Yumeji is allowed to return to Earth and work for his atonement, and he is given an ability related to his crimes (in his case, he can cut things with his hands). He can atone for his sins in three ways: by rescuing good people, by defeating bad people, or by killing others who have been released from hell. Yumeji is determined, though, that his atonement will be achieved without killing anyone. He'll have plenty of opportunity to work for his atonement alongside the justice-minded Himeji, who is already in a dangerous situation when they first meet! (Source: MangaHelpers)

Assassins–they are humans that have exceptional skills which they use in killing people. The most dangerous among them is the Assassin of Crimson–the former leader of the Assassin guild Yuuyami, and the one who killed the country's leader, King Mars. Due to this, the country's princess has declared that whoever captures her will obtain fortune and become the princess' husband, essentially becoming the next king. Virgil is a guy who has red hair and looks like a girl. He is travelling with a performing troupe while searching for his twin brother Serge. His peculiar features seem to have matched the known characteristics of the Assassin of Crimson. The following events will lead him to discover the mystery behind the death of the king–and the identity of the Assassin of Crimson. (Source: MangaIchi Scanlation Division)