Ok, This has potential. The first chapter described quite well the kind of tragedy is waiting for him if he doesn't change things, but it also seems that the ice princess girl time traveled back well. looking forward for chapter 2
More likely Howler is going to join the gang. There should be some sort of exchange to use the stone for all to benefit. I don't feel vibes of Howler being a bad guy. The only thing he has is tons of money and land, and as far as I have read so far he has not being threatened until this bank...
oh bummer, I expected the chopping by nail clipper...
But his revenge is almost complete... RIP Uruma... I hope somehow you end in a better place than Kyou... at least you revenged your friends and people you love.
Can just kill him and end the agony of us reading every week?
Unless Uruma finds a way for him to feel emotional pain... which I predict would be the sickest thing we will read in a while.