Solteun came with the paper "I'm perfect" last mini-album single 'hat' after two years. If so far only used the song for their personal stories, this one song at a time while working many were writing a novel, screenwriter and worked on the concept that shows the storytelling. The songs are connected to each other stories, but strangely, this single, "I'm perfect" is the first story of them. Epik High's Tablo wrote the lyrics and sang a duet with actress Park Shin Hye. Drumming has Killahsong (songjaeyoung), strings and keyboard, the arranger Philtre (jangjaewon), composer, arranger, electronic, acoustic and bass guitar has joined the solteun my paper. Recording and mixing engineer Mr. Sync (imseunghyeon) took part.

"I'm perfect" is the first task at the time yieoteuna title 'Oil & Water' that, after Tablo heard this song and "I really like this song, you want to write the lyrics', lyricist, clothed as a new lyric" I'm perfect "that was reborn as a title. When you are fully met one pair of men and women who deungjin world, if not to talk about perfection with 0 won this moment.

Actress Park Shin Hye is a dream factory, and featuring vocals from such MYK, first met at a concert of the Superintendent Lee Seung Hwan was also now support the first album solteun paper. MYK has operations in the first duet song "I'm perfect" to leave the Park Shin Hye in mind the 'solteun paper rebirth', Park Shin Hye was also willingly participate. Could already feel the beautiful harmony of Park Shin Hye and solteun paper've shown their skills in various OST.