Sanemi who had been in his savior's house for 3 days now.

He managed to get the full first name of his savior: Giyuu but the rest no information.

What was Muzan's curse? , or how old were the two demons?

Just as he kept asking questions, Giyuu arrives with medicine and spare bandages.

Giyuu: Hello.

Sanemi replied the same thing.

Giyuu began to change Sanemi's bandages. And that's when Sanemi noticed a detail: Giyuu was an excellent doctor.

Sanemi asks: Were you a doctor?

Giyuu widened his eyes but nodded and replied: Yes, that was 400 years ago now.

Sanemi jumped in his subconscious and also shouted: 400 years!

Giyuu was 400 years old!

To be continued