Vasati vabatana nePlayback, Woolim akapedza makore matatu semudzidzi pasi peJYP Entertainment. Akazozivikanwa mushure mekunge vhidhiyo yekuonekwa kwake paMnet's mystery singing show I Can See Your Voice, kwaakaita Ariana Grande's <unk>Problem,<unk> yakaenda kuhutachiona. Playback yakaburitsa yavo yekutanga zita rekutanga rwiyo rwiyo Playback uye zita rayo rwiyo rwezita rimwe chete muna Chikumi 25, 2015. Mwedzi mitatu chete gare gare, boka rakazivisa kuti vakaronga kuburitsa dambarefu idzva rimwe chete munaGunyana 2. Rwiyo rwerwiyo, "I Wonder", rwaive nemuimbi anozivikanwa uye muenzi Eric Nam. Rwiyo rwakawana kutarisisa kubva kune vezvenhau nekuda kwekubatanidzwa kwechikwata chakakurumbira cheNorway chekugadzira, ELEMENT, ine CV inosanganisira Cee GreenLoq, Soul Music, uye Madconild.
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