Classroom of the Elite: Year 2 (Light Novel), Vol. 7

It's time for the school's first-ever Cultural Festival! Some refuse to participate, but the rest of Ayanokouji's class secretly works to build the maid café of their dreams. Ryuuen realizes what they're up to and declares war, forcing a head-to-head battle to see which café is more profitable. But as this goes on...what business does Ayanokouji have with Kanzaki and President Nagumo?