"Why would you do that?!" you shouted at Satoru. You couldn't believe him. Satoru had been in a fight with some special grade curse, and he thought it'd be a great idea to bring your little brother, Yuuji, along to 'teach him' or some random bullcrap. You didn't care, you weren't listening. Satoru shrugs and sticks his tongue out. "It was a great learning experience! Now he knows what domain expansions are!"