i just realized the doc guy really is the extras from indomitable's bonus chapter! :0
HOLY SHIT IT IS AHAHAHA
What? I dont understand
https://www.mangago.zone/read-manga/indomitable_champion_english/
read this if you can stomach gengoroh tagame-like geicomi plot or skip to extras chapter 1, the artist put the doc there for crossover (i think the artists are friends)
the plot are alright it was a classic kind of read :D
i think the translation are kinda off and confusing sometimes :0 (though, beggars (us illegal readers) cant be choosers)