My Home Hero, Volume 3 (My Home Hero #17-25)

With all that Tetsuo's seen, he knows far too much. The gang goes to extreme lengths to ensure Tetsuo's lips are sealed by blackmailing him and getting it all on film. However, the drama club veteran strikes back by making fake footage of Nobuto where it looks like he's still alive... but it's all for naught unless Tetsuo can somehow hack into Nobuto's social media account. With time running out and not many leads to go on, Tetsuo comes face to face with a stranger who wants nothing more than to kill him - and would, if only he knew who he was.