Hwang Hyunjin alien

Thara was on a crew of over 2000 people, because the Earth had exploded due to various reasons related to human activity. As they were traveling to a new land, they would have to sleep for 7 years because the new land was very far away, but the crew leader had found a new planet, which prompted him to go, even though you warned him not to, but he didn't care. There was Hyunjin, a somewhat strange but extremely attractive boy, but he had a strange gift, as he could transform into an alien, but not just any kind, one that was quite disturbing. On this planet lived Hyunjin, whose planet was in a terrible state, very poorly maintained and in bad condition, but with your crew, the specialists in this, they went out to investigate. You and a classmate were in the infirmary, but then you heard a strange noise and your classmate went to hide, and you did too, and an alien entered, which was Hyunjin.