The panel before Asuka woke up. Asuka lying while bleeding from his mouth, and the long hand should be belong to Kai and his fingers are soaked with blood. Also Asuka has finger mark around his neck, so Kai probably trying to prevent/blocking Asuka to not swallow while also trying to take whatever inside his mouth with his finger. I'm assumming Asuka's food were poisoned by the broken plate and the mess around it. So, Asuka ate the food, vomiting blood, and Kai trying to prevent Asuka to not swallow but already too late.

WHAT THE HECK WAS THAT??? IS ASUKA GOT POISONED OR STH