One day, you went into the 4 o'clock library in secret, hoping your father wouldn't find out

After searching for a while to read a book of someone's past/future, you found one that interested you

You grabbed the book as you sat on a chair as you started reading it. When you got to the future side, it turned red and dripped what looked like blood

After a while, a tall figure stood behind you. You knew who it was and gulped

Tsuchigomori: "What did I tell you about reading those books?"