As for myself, I found it interesting for Reina to be acting out of character. I know her personality and was aware that she would not do the stuff she did in this doujinshi, but it is still fun to imagine what could have happened. That's one of the fun things about doujinshi in general for me.
Legit; and, obviously, everyone has their own preferences. Personally, I can't immerse myself into something that doesn't have the foundation of the characters being who they are (call it my pride as a fanfic writer of these two) -- staying in that box and writing/drawing the things you hope for, is what's fun, in my opinion. Actually. Hm... perhaps it's less that Reina was OOC (to me), and more that there was no explanation for it.
Yes ^ I am with you, I think seeing seeing Reina act ooc is what it is. Like I'm into nsfw doujinshi's, but idk just their dialogue and Reina specifically.
