Hm, Urooboe Uroboros (by Nishio Ishin and Takeshi Obata) is okay to read, and it’s only a oneshot, so it does not cost much time. But the plot twist is predictable like hell. I know it’s often used in manga, especially in first chapters, but did it ever catch anyone by surprise?
I remembered that Shin Angyo Onshi did a twist on the twist in its first chapter. Only read on if you don’t mind getting spoiled for Shin Angyo Onshi ch. 1 and the aforementioned Uro Uro oneshot!