Kai  senses something unearthly appearing in  the human world he is living his solitary life. He tries to find the presence that had been bothering him for some time already. When he finally does, everything comes back to its order.

Kai can't concentrate on his homework because all he keeps thinking about is his hyung.

because sometimes it's easier to pretend you don't care, than to admit it's slowly killing you.     Yixing suffers inside his mind, separated from the world, he thinks it's the best way to ease his pain. But then , suddenly, the solitude becomes too much and he has to escape.