Man, these two are great together. Momochi has noted before that they really push each other to the next level, and it shows! It helps that the two of them are quite witty, they've got that Tanashige-like banter chemistry.
Note how at 4:03, Miyabi, Harunan, and Ayumi all crack up at Nanami calling Musubu by first name without any honorifics whatsoever.