Toheart (투하트) is a South Korean sub-unit consisting of SHINee’s Key (키) & I… Read Full Bio ↴Toheart (투하트) is a South Korean sub-unit consisting of SHINee’s Key (키) & INFINITE's Woohyun (남우현). Their first mini album was released on March 10, 2014.

On February 20, a prologue video was uploaded on the SMTOWN YouTube channel, officially announcing the duo unit, that had already been rumored. Both Woohyun and Key stated that it was their idea to create this unit, since both are friends and they had interest in working with each other. They didn't expect to do a singing collaboration project, instead thinking of photoshoots and similar.

The mini album and the music video for the title track "Delicious" was released on March 10. On the same day, they held their first showcase in the Coex Artium, hosted by labelmates Minho and Sunggyu.