These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Tona Gura
Les Yay: Enough to occasionally border on Ship Tease between Kazuki and Chihaya. Hatsune also seems to be highly enamored of her sister's cuteness, even more so than Ui for Yui.