Try_hard
Thanks for the update can’t wait for the next one great reward with the Hercules method hope the haruto later gets something like a Viltrumite bloodline or body for a later reward down the line so he can later fight lala spices and what other alien or mythological creatures or demigods that out in the world that haruto is in. The Viltrumite body or bloodline would definitely fit haruto it’s very similar to a Saiyan or a Kryptonian with the Zenkai boost and are able to grow stronger the more they fight but Viltrumite have smart atoms and can hold their breath to weeks.
I hope that the mc remains human, because I feel that his race change like most fanfic would take away something essential, on top of that he already has the spiral force that makes him evolve, something like a race change would be useless and unnecessary, it could make him be like Simon (that is, at the end of the series he appears with spiral eyes), and that's it, he could make the spiral force evolve him towards the perfect form of life in the field of martial arts (because he literally evolved by means of martial arts) and it would be much more entertaining than a race change
Author I had to think about it for a while to understand what you were trying to do in this chapter, but I finally got there. If the MC finished the fight too quickly he couldn't use Hermit as a sparring partner to increase his base fighting level without power ups like Goku who doesn't fight immediately his opponents at 100% of his capabilities. Secondly, the MC may have been influenced by the philosophy of the Ryozanpaku masters who, if I remember correctly, in the original series also tried to redeem their opponents if these were worthy of redemption ; in short the MC could also be trying to use his skill [mastery leadership] to bring Hermit back on the right path and for that it takes time for the skill to take effect.