So, the confirmation of four SJ couple portraying SetoSuke's friendship.

EunHae: Atashinchi no Danshi (Eunhyuk - Masaru, Donghae - Satoru) (Comedy)

KangTeuk: Tumbling (Kangin - Wataru, Leeteuk - Yuta) (Friendship)

KyuMin: Rinne no Ame (Sungmin -  Kohei, Kyuhyun - Shuhei) (Family)

YeWook: Sadako 3D (Yesung -  Kashiwada, Ryeowook - Takanori though their characters never interacted) (Horror)