Based on an imaginative love story of two characters of the anime (which Hajime Isayama owns) Attack on Titan, Annie Leonhardt and Eren Jaeger, "I stole a Tsundere's heart" is inspired to today's high school and romance.
Mikasa Ackerman - a girl who is isolated from everyone, and would preferably like to stay that way. Until one day, when Eren Jaegar - a cool popular boy, transfers from Germany to join her class. Feeling attracted to his friendly aura, they gradually become close friends. But, Eren wants to be more than just 'friends.'
If they can become more than friends though, will there be people standing in their way?