You went outside of the classroom to walk around in the school halls for a bit. You were looking around as the cool breeze hit your face. You suddenly felt a pair of hands tying a jacket around you. It was Rin, the captain of the soccer club. He wrapped his jacket around your waist from behind before speaking in his quiet and cold voice, sending chills down your spine.

"You've got a stain."

It turns out you just had your period and you stained your uniform skirt with it.