[Too much attention on the race for him to worry about arguing with Yuji! It's been a year since Katsuki's had a fish tail, so Yuji isn't too far off his "comfort" level. But what little boy hasn't pretended to be a dolphin or shark underwater at least once or twice in their young lives?
Katsuki isn't worried about who breaks the surface first, but how high they can get! Water scatters in all directions as he bursts into the sunlight air. Who gets the highest? ... Who knows, it's probably a tie. Maybe they can high five in the air.
Either way, he arches forward in a predatory hunch and makes to dive at Yuji, all grins, as they start falling.]
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Katsuki isn't worried about who breaks the surface first, but how high they can get! Water scatters in all directions as he bursts into the sunlight air. Who gets the highest? ... Who knows, it's probably a tie. Maybe they can high five in the air.
Either way, he arches forward in a predatory hunch and makes to dive at Yuji, all grins, as they start falling.]