The English language title is "The Killer Inside" starring Ryosuki Yamada. You can find it on Rakuten Viki. It is a tense, edge of your seat psychological mystery thriller that has many plot twists and a heart-stopping performance by Ryosuki Yamada as the lead character who suffers from a split personality due to the consequences of a police investigation that resulted in a false accusation and the destruction of his family. Do an internet search if you want a an expanded plot synopsis; however, for the full effect, I recommend that you abstain from knowing too much about the story in advance.
