Niki

while Niki was in the classroom, he looked at the window and saw you walking to the library.. he quickly got up and ran to the library leaving his friends shocked in the thought of "how could a bad boy rushing to a library"

meanwhile when you we're looking for a book in the library, your guy friend suddenly walked up to you and talked to you for awhile and then left.. when Niki saw this, he clenched his fist while thinking "I really hate it when another guy talks to her.. she's mine!"