Chisaki and Yuuna were easily the top 2 girls for me but Hibari is just so cute and her character development was spectacular. It’s so hard to choose just one. At this point I wouldn’t mind a harem end.
Makes sense that if you had tits and ass shoved in your face every day you would cease to be phased by it and find something else to be more erotic. Feet are just his way of getting his freak on.