Traveling through the world of Demon Slayer Blade, but becoming a swordsman? "Then I must make the strongest sun-wheel knife!" Hammering the iron ingot, but a reminder... [Impurities-1] It was made into steel, but a reminder... [Physique +1] It was cast into a weapon, but passed A reminder... [Current weapon sharpness level 1] [Forger: Strength +10, Constitution +10, Agility +10, Speed ​​+10] [Reward: Sun Breath! ] "Why... I still become the strongest swordsman?"