There's finally a bit more movement in the past case Osanai and Kobato had solved together, they're starting to explain what Hisaka did, but we're still yet to know why, and we're still dooming on the fact, Kengo had mentioned in the earlier episode, did Hisaka pass away? I think by the end of this mystery, we're actually going to cry with sadness, or cry with relief, can't wait to find out, and we're so close to the end too.