Uh.... nightmare as in it ignores large details that would make it not work?Naaa, it will definitively happens: Edwin, Hana and Mina will become a truple and they will live their love for the rest of their lives. Which means a month since Ian will discover that, he will not accept what he will think it is a betrayal from his dearest friend, so he will solve the situation killing them all and then committing suicide.
Guys you must stop to question about the future of the characters, when I am around: I have a talent to turn their brightest future in a nightmare.
Dont even need to engage beyond: reflective Ian