Sangmi Lee requested that people refrain from making unfounded speculations regarding So-yeon’s new song. On the 11th, Sangmi Lee posted on her social media, ″No more speculation, no no~,″ along with a photo taken with So-yeon.

So-yeon released her first solo full-length album, ″A Fantastic Life,″ on the 7th and began promotions with the title track ″I’m Quitting (Narr. Kian84).″ The song creatively addresses the theme of a worker’s resignation with So-yeon’s unique wit and band sound. Immediately after its release, it entered the Melon TOP100 and ranked high on the HOT100 (30·100 days) chart. It also performed well on music charts, reaching 2nd place on China’s Kugou Music Korean chart, 2nd on iTunes Peru chart, and 24th in Hong Kong.

After the song’s release, some listeners pointed out that the introduction of ″I’m Quitting″ resembled EX’s ″Please Take Care of Me.″ It was confirmed that Expression and EX were jointly registered with the Korea Music Copyright Association, leading to various speculations.

So-yeon appeared on ″Radio Star″ and said, ″I’m making a solo comeback after five years, during which I explored various styles of band music. This time, preparing a Seoul band style for the first time, I wanted to pay homage to senior EX’s distinctive tone, so I contacted him directly and got his permission.″ Additionally, Park Jung-hyun, the producer who created EX’s representative songs, mentioned So-yeon’s first album release and supported her by saying, ″She is a musician with much to learn in many ways.″

Meanwhile, a video showing So-yeon and Sangmi Lee doing a challenge together was also released. So-yeon appeared wearing the same outfit Sangmi Lee wore when she participated in the College Music Festival, and Sangmi Lee performed ″I’m Quitting″ live. Sangmi Lee said, ″The day we filmed the reels was So-yeon’s birthday. We celebrated her birthday with a cake that perfectly suited her. It was truly a joyful day for me as well,″ expressing her support for So-yeon. So-yeon also said, ″It was such an honor to create even a little bit of the style of a senior I’ve always admired. As you said in your message, I will work even harder! Thank you so much.″