360° Material (360°マテリアル) is a manga series by Touko Minami. It was serialized in Bessatsu Margaret.
Taki is the cool yet strange guy in Mio's class. She bumps into him at the subway station after school and saves him after he almost gets pushed onto the tracks. The next day, he returns the favor by saving her from an incoming car. This marks the start of Mio's love.