She stole my sister's body, what should I do?

Iwao Lin ordered a basket of buns and a bowl of porridge at the stall. After taking a sip of the hot porridge, he felt a little better, and some of the coldness in the prison was dispelled. "Comfortable!" Iwao Lin picked up a bun and swallowed it in one gulp. I have to say, these demon slayers who set up stalls have pretty good skills! It seems that he has received special training. After Iwao Lin had eaten and drunk his fill, he headed towards the academy. What he didn't know was that when...