If you're looking for manga similar to Tadashii Ace no Kouryakuhou, you might like these titles.
Ever since being tossed aside by a Little League manager for being too small, Hiyori Tsukiya vowed to quit baseball forever. So in its stead, he picks up track and field. Hiyori excels and even places first in a national race... But even after five years, Hiyori's heart still can't seem to give up the longing to stand in the diamond... The time comes to enter high school. And by the twist of fate, Hiyori finds himself being recruited by the baseball team's mysterious manager. Will this be his chance to finally reclaim his love for baseball? Will Hiyori even be able to get along with this motley crew of a baseball team...?
Imai, a member of a baseball team, has his eyes on Hikita, a younger member who works so hard despite how awkward he is. Whenever Hikita gets nervous, he seems to glare at people. Imai just finds him so cute. "I'm the only one who's noticed how sexy you are..." He tries to get close to Hikita, looking after him in the way a more experienced member should, when deep down, he just really wants to touch Hikita's naked body!
Includes the following chapters:
Sakuraba Kenji is an aspiring baseball player, however due to some circumstances he gave up on baseball, and moved to a new High School so that he is able to give up on it totally. On the day that he visit the new school he will be attending, he meets a girl, Mamiya Itsuka who mistakenly does something to him, causing him to faint. When he awakes, he realizes that the place he will be staying at is Itsuka's home!
An office drone finds relief from his job by attending the ballpark close to his daily commute. He asks a vendor girl for a beer, but for some reason, after the transaction she sticks around him...
High school student Rin ends up posing as his twin sister to go on a date with a university student that may be attempting to blackmail him...
Rino hates baseball!! And yet, one day, she becomes the manager of the baseball club?! At first, she hated it, but Hibiya, the pitcher who dragged her into all this, said that he'll take her to Koshien...?!