Responses
It's not that hard. Just read carefully. At the end of Shibuya, Brain-Kun basically ate Mahito, in order to use his curse technique. With Mahito's curse technique, he modified the souls of thousands of people in order to give them cursed techniques and start the culling games. All in an attempt to "optimize curse energy". One of the people affected was Megumi's sister. And the gang is trying to save his sister from the culling games and trying to unseal Satoru.
shes gonne be real badass once they animate this ヾ(☆▽☆)ヾ(☆▽☆)
but I dont understand this story anymore HAHAHA ever since the shibuya arc (it was shibuya right) ive been reading this chapter per chapter without fully understanding the connections XD