Sequel to Diamond no Ace.
Continuation of Daiya no A - our protagonists continue to advance at Koshien, the biggest high school baseball tournament in Japan.

Act I - 3 Volumes (Complete)
Act II - 1 Volume (Ongoing)

It is a manga of high school baseball. The main character, who is a pitcher from a country high school, accidentally gets teamed up with a catcher from a school with an elite baseball team. He decides to quit his school to attend the school that this catcher plays.

(Source: ANN)

Giant Step is a shounen, sports comedy. With it's relation to Prince of Tennis being in some of the art of attacks and their relation to tennis. If you have already read Prince of Tennis or even a little bit of it and it was too serious for you then Giant Step would be good to check out.
(Source: MU)