Hitohiro Tanaka wakes up and finds himself in Subaru's body in the mythical first death, now reincarnated in this world and with a system, he will make his way much stronger and faster than the old Subaru.
Interesting, keep going man, and I advise you to focus on some small things, but they completely change the atmosphere of the story. For example, when Subaru was injured, you write that walking with an abdominal injury causes terrible pain and other things. If he dies, write, for example, that Subaru felt his soul being torn from his body, as if his skin was being peeled by a hot knife, and he walked quietly into the terrifying darkness of death. This is just an example. Injury and death will have a much greater value. For example, when he meets an opponent who caused him an injury in one of the tournaments, he feels a prickling sensation in the injured area to remind him why he has to win or survive, and other things. Just be creative.
Interesting, keep going man, and I advise you to focus on some small things, but they completely change the atmosphere of the story. For example, when Subaru was injured, you write that walking with an abdominal injury causes terrible pain and other things. If he dies, write, for example, that Subaru felt his soul being torn from his body, as if his skin was being peeled by a hot knife, and he walked quietly into the terrifying darkness of death. This is just an example. Injury and death will have a much greater value. For example, when he meets an opponent who caused him an injury in one of the tournaments, he feels a prickling sensation in the injured area to remind him why he has to win or survive, and other things. Just be creative.