First in the Torment Series.
Taurtis discovers Sam who lays dead beneath an anvil with a suicide note. Taurtis is wrecked by the death of his best friend and Yuki is there to comfort him through everything, finally having her Senpai to herself. Grian tries to cheer Taurtis up but nothing works. Except when they figure out that the body crushed by the anvil was not Sam. Is Sam still alive? Is he okay? Who actually died? Did Sam fake his death or is he in more trouble than anyone ever realised?
Follows after a twist in Yandere high episode 41: Someone wants me dead.
Disclaimer: I do not own anything except the twist and how the story goes from there, anything you recognise is owned by the Youtuber, Samgladiator.