Yep did mean Derek. When I wrote Denis thought it looked wrong but just thought I had misspelt it.Denis? I assume that was a typo and you meant Derek?
It is a date though, and it is made clear several times. You can only make Fuckface an asshole about it if you pick the choice that you asked Jill out to annoy Tybalt, at no point is it just a friendly meet-up.
I guess it is a date. But on the other hand it is just a game of tennis. I’ve played squash with female and male colleagues at work and at no point did I ever consider them a date. But I do agree that they call it a date when texting to arrange it.
The issue is, even before this, JILL has already developed a heavy crush on the MC - for example, she climbs into bed and snuggles up to him after he has been beaten up just to comfort him.