You and chishiya didn't talk to each other but you did have a lot in common you just didn't know it. One day you were messing around on the top of the school roof and then you find yourself falling as you are falling you can hear some yelling

"God, Give me someone that would love me, I'm lonely here!"

it was chishiya. With his friend Arisu,chishiya’s arms were open as if an angel would fall into them...and well he got what he wanted it just was a human being though. But he didn't mind. Then you just landed in his arms

Chishiya: "huh, that was fast...and she's pretty too"