"All right." He nods and feels her hang on. He's about to dive down before she says that and he just smiles. "Of course. You're my friend."

He dives down, not bothering to take a deep breath because he doesn't need to. He heads into the algae and starts swimming downwards, letting the currents carry him when they're heading the right way and pushing against them when they're not.

It's not hard, and they speed along as they dive deeper. He turns his head to check that Chizuru is still doing all right.