DOCP-008 - Secret fun under the kotatsu! She's getting soaking wet while trying to stay quiet with people around

Is the order Miyu Amano, Eri Mori, Miho Sakazaki, and finally Luna Ogata? As it goes on, the kotatsu theme becomes irrelevant, and even at the start, it doesn't feel like it makes a difference whether they're inside or outside. They're doing full-on cowgirl right next to the kotatsu even when people are nearby, so there's no sense of secrecy. The actresses are all great, though, so you can't go wrong there.