OnlyOneOf members participated on the “I give you sound as a gift” campaign production by using their voices in audio books. It is a project designed to help deaf children in need of hearing

OnlyOneOf has read a total of seventeen novels. It was awkward at the first reading, but they read every word carefully. 

Each member has read different books. LOVE read "Video of Legend" by Choi Young-hee, MILL read "Let's Gin" by Lee In-ah, RIE read "How to Become an Earthman" by Kwon Dam, YOOJUNG  read "How to Be a Goggles" by Kim Ran. NINE read "End" by Kim Hae-won, JUNJI read "The Martian of the Health Room" by Seo-jin and KYUBIN read "Baenne" by Yoon Sung-hee.

Audio books from OnlyOneOf can be found in Podbbang, and can also be enjoyed in Genie, Naver Audio Clip and Olleh TV in the future. 

OnlyOneOf released its second mini-album, "Line Sun Goodness," on Oct. 30, marking a step-by-step evolution with the title track "Sage." Starting with Mnet's "M Countdown," the company staged a spectacular comeback on various music networks, including KBS2's Music Bank on Nov. 1, MBC's Show Music Core on Nov. 2 and SBS' Inkigayo on Nov. 3.