In Volleyball Boy, Become Karasuno Tactician

(A novice author may not have a good grasp of the rhythm in the early stage, but it will get better and better in the future. If you have any problems, please point them out directly in the comments) Yuuto Hanyu, who was a trainer of a professional volleyball team in his previous life, died suddenly after staying up late for three consecutive days to study tactics and team training directions. He time-traveled into the 15-year-old Karasuno High School freshman Yuuto Hanyu of the same name in the anime Volleyball Boys. In his previous life, he suffered serious injuries to his knees and Achilles tendon, and lost the qualification to continue to stand on the volleyball court. Now in this new world, a new stage and new challenges are coming. Work hard to become the ace and launch an impact across the country! !