Sunday (선데이) is a Korean Pop singer and musical actress. She is a member of the group Chun Sang Ji Hee The Grace and the unit Chun Sang Ji Hee Dana & Sunday. She has also released two singles in Japan as a solo artist.
- Stage Names: Sunday (선데이), Sunday The Grace (선데이 더 그레이스), Zhi Sheng Sunday (智聲)
- Real Name: Jin Bo Ra (진보라)
- Birthdate: January 12, 1987
- Blood Type: AB
- Height: 164cm
- Skills: Singing, Piano, Drawing, Nail Art, Skiing
- Favorite Artists: Sheryl Crow, Maroon5, Avril Lavigne, Coldplay, Whitney Houston, Jamiroquai
She appeared in Fly to the Sky's "Maybe God Knows" music video later that year. She began living in Japan in 2002 and training for her debut.
After a period of no activity, her first recorded track was on SMTown's 2004 Summer Vacation in SMTOWN.com album. Under her new stage name of Sunday, she recorded the song "Baraem (Fight to the End)" with her later fellow Chun Sang Ji Hee The Grace members, soloist DANA, newcomer Stephanie, and Jiyeon of Isak N Jiyeon.
On July 28th, 2004, Sunday released her first single in Japan, "Lira no Kataomoi". Her second single, "UsotsukiBOY", was produced by m-flo and released on April 20, 2005. In that same month, the group Chun Sang Ji Hee The Grace debuted in with the Korean single "Too Good" The group released their first single, "Boomerang" in Japan on January 25, 2006.
It is unknown whether or not Sunday will release any more songs as a soloist.
- [2007.01.19] Billie Jean Look At Me OST (#1 Angels (Rock Version))
- [2007.04.16] Oh Lovers OST (#1 Loving You)
- [2011.04.06] Operastar 2011 Part 1 (#4 Lascia Ch'io Pianga)
- [2011.04.13] Operastar 2011 Part 2 (#4 Die Fruhlingsstimmen Op.410)
- [2011.04.17] Operastar 2011 Part 3 (#1 Summertime)
-  Fly to the Sky - Maybe God Knows
-  Rock of Ages