Jayci Yucca, born Jeong Eui-seong on February 15, 1995, in Suji-gu, Yongin, Gyeonggi-do, South Korea, is a South Korean rapper affiliated with WYSD, Neokidz, and Pyrat, and a member of the crew Wayside Town. He began his music career with the mixtape Cocoaland (2017) and officially debuted under WYSD Neokidz in 2019 with the EP Yucca Project (2019). In the same year, he released the EP Cloud Star (2019) and singles including "Drunk In Love"(2019), "It's Hard To Watch From Afar" (2019), "The Little Mermaid" (2019), and "Fader" (2019). Jayci Yucca gained attention for his melodic rap style through studio albums The Last Boy In The Class (2020), The Last Boy In The Class 2(2022), and SUJI (2026). His collaborative projects include Tocca Brown : Highteen Rockstars (2020) with Skinny Brownand Toil, Welcome To The Kicako House (2021) and Welcome To The Kicako House 2 (2022) with Pateko and Kid Wine, Love And The City (2023) and S3x And The City (2023) with Dnss, and 17 Diary (2024) with Slo. His other notable singles include "Why You Worry About Me ?" (2020), "Bottom To The Top" (2020), "Do You Need A Rockstar" (2020), "100 To 0" (2020), "Let It Flow" (2022), "Black Eye" (2022), "Sensitive" (2022), "The Last Emotions" (2022), and "Love Me Again" (2024). He also participated in collaboration singles such as "Come To Me" (2022), "Not Even Once" (2022), "Used" (2022), "After Love" (2023), "Traces Of Memory" (2023), "Balaclava Remix" (2023), "Another Night Passing By"(2023), "Seoul Tango" (2023), "Just One Day" (2024), and "Reed" (2024).