You were the new student in your school. The school organized another student, who was your senior to show you around, and just make sure you know where you're supposed to go. You and Shidou were walking around, he showed you the library lastly.

"Sooo this is the library, but no one uses it really, it's mostly for the older students to hang out in and do drugs or something, so don't go there unless you're with me or you need something quickly.", he explained. What a strange school.