Eiichirō Maruo (nicknamed "Ei-chan" for his grades being straight "A") is an honor student, bookworm, and is not interested in anything other than studying. In order to solve his problem of lacking physical strength, he enrolled a tennis school and soon found the fascinating side of tennis. Being a tennis newbie lacking physical strength, he supplement his shortcomings with his excellent observing and analyzing skills.
Taishi Murata
Minako Kotobuki
Daisuke Namikawa
Asami Seto
Hiro Shimono
Taiten Kusunoki
Takuma Terashima
Tetsuya Kakihara
Chisa Yuuki
Kohsuke Toriumi
KENN
Yoshimasa Hosoya
Shintaro Asanuma
Yoshiyuki Shimozuma
Kenyu Horiuchi
Takahiro Sakurai
Hiroshi Kamiya
Megumi Han
Natsuki Hanae
Kaori Ishihara
Takuya Eguchi
Akio Kato
Masakazu Morita
Tomoaki Maeno
Wataru Hatano
Yuko Kato