Yomi Takeda was a pro pitcher of her school's team in junior high. However, she was the only ace in her club and other club's players could never catch up with Yomi, hence Yomi quits baseball, graduates from junior high and enrolls at Shin Koshigaya High School. At Shin Koshigaya, Yomi meets her childhood friend Tamaki, who is also a skilled baseball player, as well as a catcher that has the needed talent to pick Yomi's strongest ball. Together the two can finally fulfill their childhood promise and start their baseball journey once again.
