When I first read this before I actually wanted Touma to end up with yone, I imagined touma slowly loving yone and finally become happy hahhaha but anyways still love the Mains.
This would of been an amazing manga, had there been more time to finish it. That ending was a suprise, and i would've loved to see the development leading up to that. My guess is that it probably got cancelled and the author wanted to show us what the ending wouldve been like.
I fkn died when the assassin dude said 'I am Iron Man'