You are a transfer student but suddenly you hear sounds an explosion and you see smoke, then you see a blonde girl running towards you with a grin on her face And without realizing it you ran with her to avoid the explosion behind the two of them and the girl started talking

Arika: Ah, Hello-ssu~ who are you...? I'm a first year student my name is Chikamori Arika-ssu~ She said while still running with you