H2 (エイチ・ツー, Eichi Tsū) is a manga series written by Mitsuru Adachi portraying high school baseball. It has been made into a 41-episode anime series and an 11-episode television drama series, H2: Kimi to Ita Hibi, directed by Yukihiko Tsutsumi.
Hiro has two loves: baseball and porn, but due to an elbow injury, gives up baseball, choosing a school with no baseball team. His childhood friend Hikari attends a different school with baseball ace Hideo. The two of them wish that Hiro had not given up baseball. Hiro joins the soccer team and meets Haruka, a very clumsy girl who is also the daughter of his father's boss. Haruka is the manager of the unofficial baseball club at Hiro's school. When the soccer team challenges the baseball club to a game, with hopes of humiliating them, the baseball club nearly loses until Hiro, disgusted by the soccer team's arrogance, switches to the baseball club.