What kind of magic sword will you become…?” The protagonist, Touji Nanase, who was constantly harassed by debt collectors and bullied by his boss at a toxic job, gets sucked into a dungeon that suddenly appears and is attacked by monsters! As he teeters on the brink of death, he gains a legendary item and awakens a cheat skill called “Magic Swordsman,” allowing him to transform defeated monsters into swords. Though people mistake him for a monster due to his sinister appearance and ruthless nature, he sets out on a path of revenge against those who made his life miserable…! A classic dark fantasy of revenge and overwhelming power! Yuiitsu Muni no Maken Tsukai ~Ore dake Mamono o Ken ni Dekiru~, 唯一無二の魔剣使い～俺だけ魔物を剣にできる～