SECRET's Sunhwa and T-ara's Hyomin did their job as friends by supporting KARA Hara's brand new nail book, 'NAILHARA'.

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All three idol stars took a photo together, and Sunhwa and Hyomin look happy to support Hara's fashion book. Hara shared the above photo and the message, "Sunhwa unni and Hyomin unni love my book. Thank you!" 'NAILHARA', released on June 12, is a collaboration between Hara and professional nail artist Kim Soo Jung from Trend N.

Hara revealed her own personal nail art as well as nail care tips in the book. Isn't it good to see Sunhwa, Hyomin, and Hara together again after their 'Invincible Youth' days?