A disgruntled and socially isolated young man gets whisked away to a fantasy world very much in the thralls of the Isekai genre and its tropes. Rather than accepting a normal adventure or quest against goblins or dark lords or some such, an edgy Jon Smythe decides to pick up a magic scythe and swear to murder every single isekai protagonist. The story begins in medias res, with Jon approaching his second ever isekai protagonist kill, Satou Yuusha.
An edgelord with a penchant for one liners who uses a scythe attached to his wrist by a chain which allows him to use it as a boomerang or the chain as a bind. He can absorb people's souls, giving him a crack-like high. Isekai protagonists have a big flashy absorption effect and make him generally more powerful and heal him, while other souls can be sacrificed for specific purposes like shields against magical attacks.
A fairly bland adventurer, based heavily on isekai light novel protagonists, originally coming from Earth by means of the sea foam goddess who gave him his potato-themed special ability, and the talent needed to wield his greatsword. He dies in the first chapter alongside his harem of nameless girls identified mainly by their candy-colored hair.
Formerly Satou Yuusha's slave and harem girl. A foxgirl and expert rogue, inspite of her pink hair hampering her stealth abilities. Her magic collar was broken during Jon's fight with Yuusha, and with nowhere else to go she ends up joining Jon as his apprentice.
An idealistic and passionate revolutionary against the corrupt monarchy of the world, originally coming from Earth by means of the armored goddess
An honor-obsessed and even more sword-obsessed warrior who joins Seyvour's rebellion, originally from this world. Out for revenge against Jon for murdering her girlfriend.