I Became a Swordsmanship Instructor in a Romance Fantasy Novel (Novel)

The hero who crossed over to a world without dreams or hope and saved it returned to Earth and adapted to an ordinary life. 'I will never wield a sword again.' With that resolution, he even put away the kitchen knives in his studio apartment. Then, upon seeing garbage-like swordsmanship in a romance fantasy, he unconsciously left a comment. 'Ah, that's not how you do it.' Huh? **Original Novel:** , , , **Official Translations:**.