Demon Slayer: I Burn My Lifespan to Kill Demons and Do Whatever I Want

In his previous life, Lu Fan was cheated on. He unexpectedly transmigrates to the Demon Slayer world and awakens a Lifespan-for-Strength System.

By consuming his lifespan, he can raise his Breathing Style level, and killing demons earns him more years to live.

While others train with swords, I spend my lifespan!

[Lifespan expenditure successful. Water Breathing at max level.]

[Lifespan expenditure successful. Flame Breathing at max level.]

[Lifespan expenditure successful...]

When the decisive battle at Infinity Castle begins, a swordsman proficient in every Breathing Style, including the Log Breathing Style, joins the fight.

Akaza: “Become a demon, Lu Fan!”

Kokushibo: “You are a genius who surpasses my younger brother.”

Muzan: “Could you be the reincarnation of Yoriichi Tsugikuni? Join forces with me!”

Lu Fan: “Sorry, the Demon Slayer Corps is paying too well. Ubuyashiki even gave me his wife.”