In this crossover, We see all four Isekai anime's Overlord, Re-Zero, Konosuba, and Saga of Tanya the Evil all come together to join forces, plot twist they are in School, Strange right? but how about the Anime has One more Character but This one is from USA, and has been dragged into another world, what Adventures will this young man be in? Read and find out.

Set after the ending to Metal Gear Solid V: The Phantom Pain, Venom Snake who is a body-double for the real Big-Boss is still looking after his military group called 'Diamond Dogs' while in Africa, the other Big-Boss is setting up 'Outer Heaven'. This is the story after the MGSV featuring Ocelot, Miller and many more familiar faces in the Metal Gear universe.