omfg, chapter 2, I just recognised them. It's the girl with short hair from Shoujo Sect's first chapter, then the Komai sisters and the dog girl.
I don't remember the ones from chapter 1 cus I haven't read Shoujo Sect in while, only reread the first volume, but I see a chapter tagged "twins", so those must be the twins from the limo chapter
I guess the author's just reusing the characters, making references and stuff, but idk, seeing the drunk girl and the Komai sisters kinda... makes me feel uncomfortable. She basically confesses how she forced herself on everyone in chapter 2
Maybe this entire series could be tagged as drunk, as it involves that girl being drunk and getting laid i guess