Ice cream headache?

Yup. They were eating too fast/too much at once previously.

Without seeing the front of the shirt, how are you supposed to tell the difference between Northern Ocean Hime and Northern Little Sister?

Steak said:

Without seeing the front of the shirt, how are you supposed to tell the difference between Northern Ocean Hime and Northern Little Sister?

The hands? Hoppo wears mittens, her little sister just wears bracelets. You can see her little fingers.