_chapter4-pain_

1 _giới thiệu- chapter 1_ 

2 _chapter2_ 

3 _chapter3_ 

4 _chapter4-pain_ 

5 _chapter5-painful_ 

6 _chapter6-hurt_ 

7 _chapter7_ 

8 _chapter8-get acquainted?_ 

9 _chapter9-new classmate?_ 

10 _chapter10-the true?_ 

11 _chapter11_ 

12 _chapter12-new surprise_ 

13 _chapter13-bad luck_ 

14 _chapter14_ 

15 _chapter15-unjust_ 

16 _chapter16-life?_ 

17 _chapter17_ 

18 _chapter18-broken heart_ 

19 _chapter19-chemistry_ 

20 _chapter20-chemistry(2)_ 