Demon Slayer: Kill Ghosts and Become Stronger, Kill Wuhan and Become Invincible

[Single heroine: Butterfly Ninja] [Non-traveler] [No system] As a disciple of Naruhashi, the former Demon Slayer Corps, it took him two and a half years to master Naruhashi's specialty, Thunder Breath. Thinking of this, Natsuki Matsubara felt a little ashamed. Fortunately, he had the ability to become stronger by killing ghosts. Kill the hand ghost and get a red light ball that improves your health. Kill the lower string and get the blue light ball that enhances the breathing method. Kill the upper string and obtain the silver ball of light that enhances the Nichirin Sword. Killing all the way to the end, Matsubara Natsuki looked at the dying Mukai and smiled calmly. "Wuxian, what do you think of life!" After being hacked to death, Xia Shu looked back and realized that he had been killed by an invincible hand! Key points: non-travelers, single female protagonist, single female protagonist, single female protagonist Butterfly Ninja! (Say important things three times.)