Awww they're too pretty and cute to ruin it by smoking. Listen I don't care don't smoke it's just not good for you. Find other ways to relieve your stress...
Anyway enough pontificating. I got Hiiragi all figured out. She's definitely the type of tsundere to cave to even the slightest bit of pressure or strong pushback. The moment anyone asserts themselves a little over her she melts and crumbles. I'm personally a fan of that type myself.
Thank you for the translation (either that or Hiiragi is just really horny, which is also fine. She can even be both).