I read a novel about five years ago, but I can’t remember the specific content. I’m asking for support from bookworms. This is a thriller novel about a student who is the protagonist.

"The Nineteenth Level of Hell" Chunyu is a beautiful senior girl in the university. There are Qingyou, Wenya and Sulan in the dormitory. The four girls are like sisters. They have the same hobby - playing text messages on mobile phones. They are all thumb people.

Recently, Chunyu discovered that Qingyou often kept sending text messages mysteriously in the middle of the night. One day, Qingyou received a mysterious text message, so she took Chunyu to an abandoned teaching building and asked Chunyu to take a photo for her. When looking at the digital photos on the computer, Chunyu felt that the photos were strange, giving her fear and an ominous premonition.

That same night, Chunyu received a text message from Qingyou: "Help me." Chunyu thought of the abandoned teaching building and ran over there overnight, only to find Qingyou chewing her tongue and vomiting blood and died on the spot... The next day Chunyu sorted through Qingyou's belongings and found the latest text message on her phone: GAME OVER.