The Stairs

Original Webtoon:
Daum, KakaoPage

Official Translations:
Japanese

Mysterious staircase is known as a game exhibition in Gyeonggi-do. An old man who climbed there got sick made this stairs viral to the world. But after that old man's death, the main character Hyung-joo's father is caught up in a medical lawsuit. So Hyung-joo trys to undo her father's injustice. She will enter the Stairs Research Association, with the students who agree to be there.