A boy that lives for baseball. A girl he likes. They watch each other pee and are now connected for life.  (From: MU)

From Project Bite Me! Scanlations:

From the creator of Touch and Nine, enter the world of Hirahira-kun Seishun Jingi! One of Adachi-sensei's lesser known works, it follows 7th grader, Hirahira-kun as he deals with the 8th grade bully, Daimyoujin and tries to gain the affection of his fellow classmate, Yocchin!