Toru Oikawa is a third year student at the Aoba Johsai High School and is the captain and setter for the school’s Boys’ Volleyball Team. Oikawa’s talent lies in his natural athletic capabilities and making use all his teammates as the main setter of the team. His most feared ability is his jump serve for its power and accuracy.

Haikyuu!! is a Japanese manga series written and illustrated by Haruichi Furudate. The story follows Shoyo Hinata, a boy determined to become a great volleyball player despite his small stature. Shōyō Hinata, after seeing a volleyball match, aims to become the next "Little Giant" and thus joins his middle school volleyball club. After finding new members, he sets out for the middle school tournament, where he crosses paths with a formidable school with the "King of the Upper Court," Tobio Kageyama. Although his team lost, Hinata is still determined to aim for the top and exact revenge on Kageyama. Upon entering high school, he receives the biggest surprise: He and Kageyama are in the same high school volleyball club!

(from Haikyuu!! Wiki)