On October 4,�HOW Entertainment�announced, "The first member to work with Hwang Chi Yeol's girl group collaboration project 'Fall, in girl' is G-Friend's Eunha. We appreciate all the attention following the project's announcement and ask for you to look forward to Hwang Chi Yeol and Eunha's new song."�

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This will be Eunha's second duet after "Inferiority�Complex" with�Park Kyung back�in May, and the new song by Hwang Chi Yeol and Eunha�will be released on October 12!