During 'F.T. Island 10th Anniversary Showcase' broadcasted on�Naver 'V' Live, Jonghun shared that they were originally planning to do a male duet for the special version of ''Love Sick'' and ''I Hope''.�Hongki further revealed that he had Heechul in mind for his duet partner but was rejected.�

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Hongki explained, "Heechul said he really loves our album so he doesn't want to ruin it. So I said that it'll be alright because he sings well and it's a song that he can have fun with but it ultimately, didn't happen."