Theory: Either bad boy’s stone has the power to block the connection, the island has some special power, or bad boy gave Siwon a fake stone and has the real one, using it to his advantage and tricking Siwon into thinking the situation is what he wants, but it’s actually what bad boy wants.
I actually like Aleph. I really want to see more character development on his part and maybe some flashbacks to his and Mishe's past. Mainly to see why he told her she was useless when she has done so many useful things throughout the story. (And unuseful, but we'll just ignore those.)
Theory: Either bad boy’s stone has the power to block the connection, the island has some special power, or bad boy gave Siwon a fake stone and has the real one, using it to his advantage and tricking Siwon into thinking the situation is what he wants, but it’s actually what bad boy wants.
Same idea. He maybe using the the stone and the one that he gave yo siwn was fake.