Umbral Earth (смешанная)

Time is a fickle thing. It bends and it weaves, yet it continues to flow. An unceasing river… at least that should be the case. But it is not always so, and errors may arise when the exceptions occur. When the river of time is blocked and forced to cycle, the impossible becomes possible and those who should not exist will emerge from beneath Fate’s foam.
Or in other words, what happens when someone from Earth gets merged with Byleth and tries to reach a golden ending. A semi-serious story about a guy trying to game the system and save everybody. As for how that ends up, well…