What did Nagisa and Ushio die from?

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Tags

1. #together
2. #being
3. #years
4. #birth
5. #depressed
6. #pulls
7. #finally
8. #becomes
9. #death
10. #himself
11. #tomoya
12. #happy
13. #disease
14. #because
15. #learns
16. #after
17. #again
18. #nagisa
19. #sadly
20. #ushio
21. #giving