Demon Slayer: Muzan Overcomes Sunlight, Then Spends 500 Years Alone

[Muzan x Qing Li] [Two Male Leads]

From the start, he overcomes sunlight, followed by the daily life of the Demon King raising a child. Sweet and doting, with a little Doma and Kotoha. Happy ending. No whitewashing: Muzan is a terrible person.

Synopsis:

Ever since Lord Muzan ate that pitiful blue-haired boy, he's been able to enjoy the happy life of eating two little buns a day, even in broad daylight.

But being invincible turned out to be so lonely! After becoming the ultimate life-form, he was left with just one thing: boredom!

As his fingers once again opened a notebook he hadn't read in ages, an unfamiliar yet familiar illustration caught his eye: the Blue Spider Lily.

Unfamiliar, naturally, because in five hundred years of searching, he'd never once seen the flower with his own eyes. Familiar, because that shade of blue seemed to connect it to the pitiful blue-haired boy.

After striving for five hundred years and taking a three-year break, Lord Muzan seemed to have found a brand-new goal: waiting for the flower bud halfway up the mountain to bloom.

And so he waited for five hundred years.