The Almighty adventurer... got fired from the guild early... because of aging and decreased performance... and couldn't even claim retirement pension. MAKES SO MUCH SENSE.
That's one retarded Adventure guild. Even if he is "old" and can't keep up with the younger adventurers, he's still a renowned skilled adventurer with years of experience. At the very least, they should have made him an instructor or a staff member at the guild.
Random Centaur is random might as well have made it a minotaur at least that appears more beastlike then a confused horseman attacking a town by himself
The plot, art, action scenes, and writing makes this feel like it was written for ADHD young children. I'll see how it goes though, and yes I know my opinion means nothing to anyone else as it's just MY opinion.