[1] On September 1, Super Junior-D&E announced that they have established their own agency called ODE Entertainment where the duo will serve as the Co-CEOs.

[7] ODE made an announcement the following day that Eunhyuk will release his first EP Explorer on January 27.

[16] "You & I" is a dance-pop song with disco-style guitar and bass with guest vocals from Super Junior bandmate Cho Kyu-hyun.

[16] The EP concludes with R&B special track "Empty" which features Donghae as the lyricist and the composer, narrating the longing of a departing lover and reliving memories together.

[18] On February 7, he perfomed "Up n Down" in Music Bank and jokingly stated that he would retire if the song went at number one, which it eventually did.