chap 5

1 Chap 1: giới thiệu 

2 chap 2 

3 chap 3 

4 chap 4: sửa lại 1 chút 

5 chap 5 

6 chap 6 

7 chap 7 

8 chap 8 

9 chap 9 

10 chap 10 

11 chap 11 

12 chap 12: Happy birthday YangBoWen 1/6/2010-1/6/2026 

13 chap 13 

14 chap 14: Happy birthday to me 