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!
Mangaongoing

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!

Other titles · Tsuuhan de Katta Youtou ga Gachi Datta ~Tameshigiri Shitara Kuukan ga Sakete Isekai ni Tobasareta Ageku, Densetsu no Yuusha da to Kanchigai Sarete Komatteimasu~ • 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〜
Also known as
Tsuuhan de Katta Youtou ga Gachi Datta ~Tameshigiri Shitara Kuukan ga Sakete Isekai ni Tobasareta Ageku, Densetsu no Yuusha da to Kanchigai Sarete Komatteimasu~
Also known as
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〜

by Hinokage Sora

12 chapters
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...!?

Chapters

Title details: mangadex