This is one of the few anime where the main couple is confirmed to fuck.
In keeping with the trend, anime labeled "romance" prevent their main couple from having a successful romance, where young teens who are busy murdering people can still get together.
* grumble *
I am terrified to discover that there are Gasai stans out there.
The Yandere is not your waifu! What is wrong with you?
She's a very compelling character, but I don't think you're supposed to fall in love with her, unless you have a death wish!