It takes place after the blacksmiths arc
Domain of water, Giyuu's bedroom in the middle of the night.
Giyuu slept peacefully in his futon until he felt someone shaking him gently but waking him up instinctively.
Giyuu pov: However, there is no one in my house except me.
He opened slowly and what he saw made him blink his eyes several times to see if he wasn't dreaming!
Above him were a pair of ruby red eyes framed by jet black hair.
Musan: Good evening.
By reflex Giyuu shouted: AAAHHH!
Two hours later Kagaya's house, indoor meeting room.
All the pillars were invited for an absolute emergency meeting. Everyone was wondering what was happening to get them out of bed in the middle of the night.
Shinobu noticed Giyuu's presence in a corner where Master Kagaya appeared. Everyone was worried to see Giyuu usually so impassive shaking his whole body drinking tea clutching the cup with a look of fear on his face.
Amane arrived to announce that Muzan had appeared in Giyuu's room that very night.
And that Giyuu had managed to escape thanks to a tunnel built by one of his predecessors.
Sanemi shouted angrily: Why was that garbage Muzan at Giyuu's house!
Amane replied: According to Giyuu's words, Muzan simply asked...
Sanemi: Asked what? That of becoming a demon?!
Giyuu replied in a frightened voice: In marriage.
Sanemi was speechless and he was not the only one all the other pillars were looking at Giyuu with wide eyes!
Muzan proposed to Giyuu!
End