Yuka Hirata

Kō Kitamura, whose family owns a sporting goods store, has known the Tsukishima girls since he was born. The Tsukishima family runs a batting center and cafe, and they have four daughters. There's Ichiyo, the responsible eldest; Wakaba, Kō's cheerful best friend; Aoba, who doesn't get along with Kō; and Momiji, the energetic youngest daughter. When Kō enters high school, he aspires to lead his baseball team to the Koshien National High School Championship as their ace pitcher and make Wakaba's dream come true.

Beast-Fist is a form of martial arts where the powers of a beast can be acquired by sensing the beast in their hearts. There are two relative schools of the Beast-Fist. One, the Beast-Fist of justice, Geki Juken Beast Arts. And one, the evil Beast-Fist of Rin Juken Akugata. The two schools of warriors learn and change in order to increase in power every day, as they are destined to clash.