KnB: I Became the Manager (Dropped)

MC wakes up to find himself in another world after his death. Years later he realises he's in the world of KnB and becomes op with his own luck and effort. Joining the Seirin team as a manager and hidden ace, he'll take the basketball world by storm. . --> Disclaimer: Canon characters and plot are not mine. Cover is not mine. --> Basketball matches are not written very well and won't go into too much detail. --> Updates are when I'm free.