The battle for the top classroom is about to begin, summon the beasts! "I don't want this kind of classroom!" - the stupid Akihisa's shouts echoed throughout the campus. This is Fumitsuki Academy, which is famous for its strict class division system. In the A-class classroom, there are complete air conditioning and adjustable seats for the excellent elites to use; while in the classroom of the bad class assigned to Akihisa, there are only shabby dining tables and rotten tatami. For the energetic girl Mizuki who has been in love for a long time, Akihisa instigated the class monitor Yuji to start a fierce group war. A dangerous gamble for the right to use the top classroom using the experimental summoned beasts developed by the academy is about to begin!