Miracle Giants Doumu-kun (TV Series, 49 episodes, AniDB)

Requested before Jun 2019

Miracle giants domu kun is a typical sports anime. It`s about a kid named Domu, who joins the Yomiuri Giants (a real Baseball team) because it was his father`s last desire. Then he mets some rivals and makes lots of friends. Clearly a baseball anime, with a rather young boy as the hero. It features a real baseball team, (the Yomiuri Giants). The other principal character is a teenage girl who is apparently a classical music star and also interested in sport.