When the events of Nelson vs Murdock first happen, Foggy doesn't leave. Sure, he's angry and scared, but he doesn't walk out.
But then Foggy dies. Maybe Nobu's gang come for vengeance and find him in Matt's apartment. Maybe Wesley puts two and two together and somehow realises that blind lawyer = man in black. However it happens, Foggy staying with Matt and not walking out means he gets hurt/killed.
Matt is heartbroken. Only to wake up the next day, back on his couch. Foggy doesn't know about his powers, or his reasons, or any of it. It's like yesterday never happened.
Matt tries repeatedly to save Foggy. Day after day after day. Whatever he does, Foggy gets hurt/killed. And somehow he realises that the only way Foggy is safe is if Matt lets him leave.
Cue the outcome of N&M being the only way to break the cycle.
Nelson vs Murdock - Groundhog Day!AU with a twist
But then Foggy dies. Maybe Nobu's gang come for vengeance and find him in Matt's apartment. Maybe Wesley puts two and two together and somehow realises that blind lawyer = man in black. However it happens, Foggy staying with Matt and not walking out means he gets hurt/killed.
Matt is heartbroken. Only to wake up the next day, back on his couch. Foggy doesn't know about his powers, or his reasons, or any of it. It's like yesterday never happened.
Matt tries repeatedly to save Foggy. Day after day after day. Whatever he does, Foggy gets hurt/killed. And somehow he realises that the only way Foggy is safe is if Matt lets him leave.
Cue the outcome of N&M being the only way to break the cycle.