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- Spring Up
- OK! Junbiwanryo (OK! 준비완료; OK! Ready)
- Sumbakkokjil (숨바꼭질; Hide & Seek)
- Put Sarang (풋사랑; First Love)
- Morning Call (모닝콜)
- Janghwa Sineun Goyangi (장화 신은 고양이; Puss In Boots)
Spring Up is the debut mini-album released by ASTRO. The song "Sumbakkokjil" was used as the lead track.