Welcome to Demon-School, Iruma-kun

Ameri carefully plans out her date with Iruma by going through guidebooks and her favorite manga, "First Love Memories." They are finally going on their date that she'd been dreaming of! They end up going to Aqua Case, an aquarium that is also a waterpark! Ameri tries to make various exciting things happen on the date with her secret plan, but everything she tries doesn't seem to be backfiring, and...