Dogashi Kaden!

From Mangashare.com

Our Hero is aspiring to be a basketball player since his childhood. Although being short, Haruyoshi joins the basketball club in his school, but always was just the 'errand boy' for the rest. Running... into a girl changes his destiny. She, being the clubs manager, investigates a scouting note which leads her back to him after their first encounter. Will she turn Haruyoshi into a great basketball player?

From SCX-Scans

Haruyoshi, who has always been stuck as a benchwarmer, plans to start fresh at his new school. Luckily, Haruyoshi runs, literally, into the basketball club manager, Hadzuki, who sees potential in him. However, things won't be a smooth sailing from there...