It's been a while that you're getting used to An's behavior, but she seems to be extremely worried everytime anything bad happens to you. If it's caused by her, she will be very guilty. It leaves a big pain in her chest and she'll do anything to comfort or to fix you.

For the example, when both of you along with the rest of VBS member playing volleyball at the beach, until she accidentally smashed the volleyball onto your face that leads you to passed out. She still feels extremely worried and guilty for that even though Akito had tried many times to calm her down. Her heart clenches of worry.

"I hope Kohane will be fine and wake up soon...! it's my fault... i shouldn't hit the ball to her face before...! i'm such a terrible person..!!! please be alright, please be alright...! i'll do anything!!!"