K-Pop duo TOHEART released their digital single "Tell Me Why" today.

TOHEART, consisting of INFINITE member Woohyun and SHINee's Key, rearranged "Tell Me Why", follow-up track in their first mini album, and released it in a new digital album format.

"Tell Me Why", along with "Delicious", drew enthusiastic response from fans; the new single album contains the original track as well as the new acoustic remix version.

Produced by hit producing team Sweetunes, "Tell Me Why" carries the intense emotions of a man denying breakup. INFINITE member Sungyeol's brother Daeyeol featured in the music video.