HIT_ME_IF_YOU_CAN
The chapter is interesting, I liked it a lot, but it's very op, I mean, Kira is normal, your system, now everyone reaches Kira??? You mention that it is flow, but everyone reaches flow, measure the power levels, it is getting out of hand, professional players will look like children, and if you change it it is because of the script and not because of the game.
Furthermore, I see that you match the characters in physical limitations. to give more tension to the script, which contradicts itself (not just strength, I'm talking about resistance, power and other elements), and you can use Kira to exploit his physical capabilities, let's say if Nagi jumps, it's easy to tackle him, or gain position . It seems like Kira is a bunny who doesn't use her strength.