@Mr Poltroon Let me help you abit :3
In Hiiragi Yuzuyu Route you have to make 2 Choices at "11 May"
»Just surprised that you're speaking your feelings so honestly« → »Ask if she has a crush on anyone«
I found this on http://seiya-saiga.com/game/smee/friendlover.html Translated to English
■ 5/11
It is rare and honest
I will ask if there is a favorite guy
Here is the japanese Version:
■5/11
珍しく素直だな
好きなやつがいないか聞いてみる
After Hiiragi Yuzuyu Final Event. There is 2 more choices. (Translated from Japanese to English by Google Translate)
■ Yuzuru route I also got a first kiss Come on! I am the first to kiss! What?
In the Translated Game Version it says
»Yep, Today was our first kiss.« → »Wait, wait! Nobody ever said that wasn't my first!«
I'm not sure if any of these choices makes any differences. Just wanted to add it.