Giyuu's subconscious.

Even there Giyuu floated but in a huge expanse of water surrounded by crystal containing each of them their own memories.

And one of them shows the moment he was transformed into an immortal.

He was then 1100 years ago a simple human who remained bedridden because of his fragile health.

It was at this time that a doctor came to offer him to drink a beverage containing blue spider lily.

Giyuu drank the brew because he wanted to live.

It would have been the worst mistake of his life.

Now here he is immortal and he was not afraid of the sun unlike Muzan.

And here he is, a prisoner of this…monster.

To be continued