Kimi ga Kantoku!

The Saturns, a slumbering baseball team, are once again stuck in last place this year. Their previous manager was fired before the All-Star break, and 17-year-old Enishi Kera has taken over as manager for the second half of the season! A current high school student and a 17-year Saturns fan! Will her cheerful personality change this losing team...? Aim for a miraculous comeback victory!!

(Source: Kodansha, translated)