-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Characters: cho kyuhyun,Chae Lee,sungmin,sunny

Kyuhyun:sungmin's youngest brother,CL's bestfriend,sunny's college classmate......

Chae Lee: sungmin's girlfriend,sunny's rival,kyuhyun's bestfriend and obsession

Sungmin: CL's boyfriend,kyuhyun's older brother,sunny's crush and type

Sunny:,CL's enemy,kyuhyun's college classmate & hatred ,sungmin's neighbor

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

others:2ne1 and SuJu mem.

Lee Donghae-kyuhyun's bestfriend & classmate,dara's boyfriend,yesung's neighbor

sandara park-donghae's girlfriend,CL's friend,yesung's ex-GF,leeteuk and bom co-professor,bom's friend,english professor

Ryeowook-sungmin's bestfriend and college classmate CL's friend,a nerdy student,kyuhyun's ex-bestfriend

Hyoyeon:sunny's bestfriend,CL's rival too......,sungmin's college classmate,kyuhyun & donghae's classmate and a student's threat.......................

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

yesung-kyuhyun,CL,sungmin,sunny,donghae,hyoyeon,ryeowook's math professor & dara's ex-boyfriend

Leeteuk-(all college students)professor, yesung's co-professor and friend ,science and history professor,Bom's husband

Bom-leeteuk"s wife,yesung & dara's co professor ,P.E. & music professor,dara's friend too..........