Rin had gotten into a fight at school. And of course, been grounded for a week so meeting your boyfriend outside of school had been getting difficult. Even at school, he was either at practice or in class. He even had his phone taken away so there was not much he could do to contact you.
It was the third night of him being grounded. You haven't heard a lot from him. You often check your phone in case he texted by stealing his phone back from his parents. Although he's usually asleep at this hour.
You toss your phone away, choosing to focus on the math problem in front of you, trying your best to study even with how much you missed Rin. A few minutes later, you want to pick up your phone again but just as you're about to, there's a knock at your window.
You ignore it at first, thinking it's probably the wind or a bird. Then there's another knock. Three very loud and firm knocks. You spin in your chair, confused. Your mouth drops open when you realise who's outside your window. You stumble out of your chair, almost smacking your toe on your bed corner as you reach for the window, sliding it open to let Rin inside.