From the New World Vol. 4 (manga)

Now twenty-six, Saki and Satoru seem to be well-adjusted adults. While they've never forgotten the cruel fates of their childhood friends, reforming the town's severe ways has been beyond them. Change has a way, however, of crashing in. And in this case, at a time when those within the rope are celebrating their summer festival, change is going to rain on them violently!