Synopsis: The cursed sword I bought online turned out to be the real deal! When I tried to test-cut, space split open and I was transported to another world, and then I was mistaken for a legendary hero, and now I'm in trouble!

Tsuuhan De Katsuta Yoto Ga Gachi Chidatsuta Tameshigiri Shitara Kukan Ga Sakete Isekai Ni Tobasareta Ageku, Densetsu No Yushiya Da to Kanchigai Sarete Komatsute Imasu Bureibu Bunko / 通販で買った妖刀がガチだった〜試し斬りしたら空間が裂けて異世界に飛ばされた挙句、伝説の勇者だと勘違いされて困っています〜 College student Souji Miyamoto ends up getting transported to another world after test-cutting with a replica sword he bought on impulse. Because he arrives right in the middle of a hero-summoning ritual in a certain kingdom, Souji is mistaken for the Hero. By a strange turn of events, the princess discovers that he’s actually a fake. Holding the fact over him that if others find out he’s an impostor he’ll be executed, Souji is forced to set out on a journey to defeat the Demon King. However, every member of the Hero’s party turns out to be seriously eccentric—each with their own complications…!? With his imitation-turned-cursed sword in hand, the journey of a fake hero starts now!