From Shinnen:
Taki is cool and is very smart, but likes to go at his own pace. Mio sees Taki at the subway station one day, but suddenly, Taki does something really strange....!?

From Wild*Hope:
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.