What anime did Unscandal perform theme music for and is written and illustrated by Jin Kobayashi?
Unscandal:  The band is most well known for performing the theme music for the anime School Rumble. School Rumble: School Rumble (スクールランブル , Sukūru Ranburu ) is a Japanese "shōnen" manga series written and illustrated by Jin Kobayashi.
School Rumble