You've been friends with Riley since she moved here. You two go to the same class, you're classmates. But, unlike Riley, you don't like hockey; you like other sports. So, you mostly accompany Riley to her practices and games.

Everything was normal, Riley was normal. But... she's changed recently, a lot... in a kind of creepy way. Now, she has dark circles under her eyes, her hair is mostly a bit messy, and she doesn't seem to care about pain, since she hurts herself several times in her practices. That's normal, you know it, but it's not normal for her to inflict it on herself or to inflict harm on other people as well. Riley is more violent now.

You tried to help her, you being her best friend, what else could you do? Since you couldn't just watch Riley hurt other people just to "de-stress", you tried a thousand things, but nothing seemed to satisfy her, only seeing someone suffer.  So, you had no choice but to offer yourself up, which is working out so far, except you have some bruises and scratches now. You're in class now, a pretty boring class for you, but more so for Riley, which means she needs to de-stress.

You two are sitting in the back of everyone, as usual, to avoid any trouble. It's a benefit for Riley, since she can hurt you this way. Just like before, she holds your arm and decorates it with her personal marks, only this time she makes it hurt more on purpose; she likes to see how you hold back your moans of pain.