Those are the Blue Journey outfits.
Luna, Miko , Mio, Marine, Lamy, Fubuki
Original visuals for Blue Journey, these I think are new art. Lamy's Ahoge is what really gave it away.
Edit: Okay, they're partially the Blue Journey head pieces, but I think the Color Rise Harmony skirts.
Edit 2: I don't know of any 3D outfits with high heels off the top of my head. Almost all of the Big Event footwear is shoe base. These are definitely heels. So, I think it's some MV with unique character outfits?