The glitter is a hotel in Toues evil resort that all the base game routes end up in at some points. The glitter has many mysteries but the first one is why Toue instead of immediatly kidnapping Aoba decides to give him a nice place to live, scheme and of course have gay sex for a few days. I understand he is planning to brainwash everyone but still it doesn't make a lot of sense why he's just letting Aoba and co near him at all he litterally doesn't have to. Either way next mystery of the glitter is the doors do not close all the way. When Koujaku is washing his cloths after Aoba threw up on them while having a photonarcotic induced seizure at the nightclub the bathroom door doesn't close all the way leading to Aoba seeing the tattoo of flowers on his back. Also in the Koujaku route while Aoba is passed out after having a photonarcotic induced seizure at the nightclub the door to him room is cracked open so Koujaku can come in and koujack off to him.
Next feature of the glitter, the layout is spesifically built for yaoi in a way that could only be desighned by the desighners of a yaoi game. But in universe it was desighned by Toue or one of his architects I guess but there would be no reason for it to build like this But let me describe how the glitter is built. You enter into a living room with two couches and a wood floor and there is two floors the stairs are at the very back of the living room. There is a bathroom and a spesific seperate room for washing cloths (not a washer and dryer by hand) next to the right of the living room and a kitchenette to the left of the living room. This kittchenette I theorize comes with a frilly apron because Clear was afraid to go into public before she met Aoba and after meeting Aoba they were busy with all the taking down the government stuff, so either the frilly apron comes with the glitter or her grandpa got it for her and I like either option. SO upstairs is another living area almost exactly the same as the downstairs living room but there is a tv that only airs Toues broadcasts. The the left is a bar filled with alchohol and then to the right is two identical bedrooms witch both have king sized beds. Either way I wouldn't desighn a building like this unless I was desighning it just for yaoi so my theory is Toue is just a fujoshi and that is why he does the things he does because otherwise I don't understand how his mind works.