Urenokori no Dorei Elf wo Hirotta no de, Musume ni Suru Koto ni Shita

is a Japanese light novel series written by Haruka Touko, with illustrations by Matsuuni. The series began publication on February 17, 2023 by ASCII Media Works under their Dengeki no Shin Bungei publishing imprint.

Synopsis
"Capture" the boss of this world and "capture" all unreasonable things! When he woke up, the man was reincarnated in the world of the epic RPG "Spirit Battle Dungeon Magia". However, it wasn't the protagonist who was reincarnated, let alone that mob. His abilities are modest. His performance is crap. His favorite phrase is hyahha. "He was reincarnated as a fucking small fish bottom boss who was destined to die in the tutorial!" "Of course, I have a dead end in the not too distant future." What's more, the man who learned that his beloved sister was also destined to die of illness... Therefore, the man decides to rebel against the official history (scenario) by making use of his vast knowledge of games. And then, the strongest secret boss, one of the most traumatic root bosses in the game... he will "capture" the bosses of this world before long...!