Judging by the scene I assume what Satori read in Seijas mind was too much for her to handle and resulted in her vomiting.

Looks like Seija is just too darn cute for Satori to handle

kuro666yume said:

Looks like Seija is just too darn cute for Satori to handle

She's so cute she's forcing Satori to forcefully decrease her current load of element cute for her to even come into contact with it

You can see it clearly with how said excess load is sparkling with Rainbows and cuteness

satori's 3rd eye is puking. thats gotta mean something

usmc10486 said:

satori's 3rd eye is puking. thats gotta mean something

Is it puking or crying?

I honestly cant tell

Satori is a virgin confirmed

satori can't take anymore diabetes

Guys, that's not vomit, that's SUGAR. These two idiots were so cute they made Satori puke out sugar!