Blue Underworld

They expected to learn the deep, blue underworld's secrets and have fun and adventure while they're at it.
What they didn't expect was to become part of it.

Aina, Sunny and Hannah are Supers but their Circs are not activated yet, stopping them from entering college.
So, they went with their Bio Professor/ Uncle on his marine biology research along with his sophomore class.

But something happened along the way that forced them to keep secrets on their return from the ocean.