That is so hard

1 Introduction 1 

2 Introduction 2 

3 enters in the cooperation 

4 becoming the assistant 

5 That is so hard 

6 getting some closer 

7 party or fitting 

8 The Carten Boys 

9 Getting relationship 

10 We are going ! 

11 Having fun 

12 Really , this Motherf*cker 

13 Note 

14 going back with him 

15 Note 

16 hello brother 

17 Sing the song 

18 Inner Feelings 

19 Special Note ( Author's Note ) 

20 The secret ! 

21 sing with me 

22 wedding ! ( Last episode ) 