2.43: Seiin High School Boys Volleyball Team
Original Title：2.43 清陰高校男子バレー部
Languages:
- Chinese: 2.43 清阴高校男子排球部
- Japanese: 2.43 清陰高校男子バレー部
- English: 2.43: Seiin High School Boys Volleyball Team
- Russian: 2.43: Мужская волейбольная команда школы Сэйин
"2.43: Seiin High School Boys Volleyball Team" is a Japanese light novel series written by Yukako Kabei and illustrated by Aiji Yamakawa. The story revolves around Kimichika Haijima, a genius setter, and Yuni Kuroba, his childhood friend with exceptional physical abilities, as they navigate the challenges of the Seiin High School boys' volleyball team in Fukui Prefecture, aiming for the national tournament. Haijima returns to Fukui after causing trouble in Tokyo's volleyball scene, reuniting with Kuroba. Although their friendship had fractured during middle school, they join the same high school volleyball team, working together with their diverse teammates to achieve their dreams. The series is praised for its in-depth character development and intense match scenes. The novels began publication in 2015 and were adapted into a manga and a 12-episode anime television series by David Production which aired in 2021.