[Demon Slayer Crossover] The Sound Hashira Cares About the World

The Sound Hashira and his little girl named Sekai transmigrated.

Though they were childhood friends and a married couple, the two were constantly mistaken for something else.

But the Sound Hashira wasn't the problem.

It's just that Sekai-chan was already an adult, but still looked like a little girl.

Which led to:

A certain black-haired pro hero: [Looking at them suspiciously]

A certain black-hearted doctor with a thing for little girls: [Looking at a kindred spirit]

A certain ninja with high-tech gadgets: [Looking at a fake ninja]

Lord Tengen has only one wife!!!

Sekai-chan really is an adult!!!

OOC warning!!!

Theme: Little girls are the best