Possible future fics: 1. Shirou replaces subaru re0 2. Cote reacts to vol 0 3. Toaru reacts to touma 4. Toaru x fate 5. touma in re0 6. Lelouch becomes a servant in fate series 7.arthur replaces subaru re0 8. Heroic characters react to touma 9.  Shirou replaces artoria in fate/0 10. Danmachi reacts to future 11. Shirou in arifureta