(짝사랑은 힘들어) is the fourth digital single by SEENROOT
. It was released on October 12, 2015.
The song will be later include in their first studio album Seenroot's Wonderland as the tenth track.
- "Secret Crush (짝사랑은 힘들어)" - 3:22
- "Secret Crush (짝사랑은 힘들어) (Inst.)" - 3:23