Hello my little ones ! It would be a long time explaining this situation, but the only thing you have to know he's that all of this characters are bound to same fate !
The two tied up boys are Tobias and William, and if you want to know, William is Tobias before he lost his memory .w.
And for the two other boys looking at their prey, they are their boyfriends ! Neuko on the left and Robin on the right ! The two of them are thieves, so it's really funny .w.