Not being able to directly read
chapter 21 from here is so inconvenient because no forum thread :(
Hopefully they link it soon.
So I guess the hero was doing everyone
but the demon King, huh? It would have been funnier if they did tho.

Watari was always suspicious but hopefully it's not as simple as "I wanted all the money lol". It's also possible that he is also their sibling, anyone could be at this point.
And since the spider guy (forgot his name) will probably be more important since he joined the gang that kinda justifies taking so much time.
Bro lost his ball...

Now to contact the other siblings, (try to) make an epic team and Tatakae! Tatakae! Tatakae!