Pink Heart is a 4 member girl group formed by XING Entertainment and they've been around but didn't make themselves big. They haven't debuted yet and have only had a few videos and appearances here and there.
Oldest Member - Kim WonHee
Birthdate: 10th May, 1993
Height: 162cm
Oldest Member - Park Seo Jin
Birthdate: 11th March, 1994
Height: 167cm
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Jeon Minjoo & Maknae Park Suji
Minjoo - 8th September, 1994
Suji - 1st October, 1995
Credits: As Tagged/Daum/Cyworld + CYNOSTAR.NET + canityo @ soompi