Oh right QU4RTZ episode. I really liked the relaxed vibe that the episode had, which matches completely with the image of them as an unit. Following the trend of season 1, the mv has a lot of references to SIFAS cards, which is a good addition for fan service and because they are cards with good designs. The girls trying to sync up also brought some good and simple comedy to the episode, that also felt natural because that type of situation might happen to someone.