This is the probably the first time we've actually seen how possessive and jealous Rikidou can be, not just in terms of wanting to monopolize him as her martial arts student, but also in terms of affection, or "tough love." I do love Big Sis Miu though, she's such a cherry and kind onee-san. And man that one panel with Setsuna's delightful and shapely ass, and that panty line is just chefs kiss.
They're both so incredibly hot and crazy in their own way, like Michelangelo himself sculpted them. To be built like this is insane and I feel like the proportions have gotten raunchier compared to the beginning of the series.