Kokushibo was the demon who managed to capture Giyuu.
Kokushibo returns to Giyuu's room, this time the door is repaired and stronger, and puts him back on the futon.
After doing what needed to be done for the young master, Kokushibo retreated while locking the door tightly.
Kokushibo went to tell Master Muzan of his son's successful capture.
As for Muzan, he was still looking panicked for his beloved son.
Muzan: Damn, where is he?
Kokushibo then announced: It's good, he's back in his room.
Muzan jumped and cried with joy.
Muzan: Your the best upper moon ever!
To be continued