@ohms
There's still some new isekai gems out there :
- Killer Shark Isekai, sharknado strikes back (https://mangadex.org/title/58826/killer-shark-in-another-world)
- The Ride-On King, Putin is in another world too? (https://mangadex.org/title/27202/the-ride-on-king)
and that's only naming 2.
This seems like the kind of training that could have been done without any "trainers". Anyone at all could have pummeled him with a sledgehammer and had Drow-chan heal him to raise his durability.
Can someone explain to me why his Endurance got - 5? Debuff because he's too tired?
Also, hope the mangaka gets healthy someday. Don't want him to force himself and make this manga ended up like Hunter X Hunter.....