tripleS, the largest K-POP girl group with 24 members, introduces a new Japan-selected unit: tripleS Hatch!, featuring eight members -- S3 Jiwoo, S4 Chaeyeon, S5 Yooyeon, S6 Sumin, S11 Kotone, S16 Mayu, S20 Shion, and S21 Chaewon. This unit's debut EP is now available. Each version includes one "Double Class Objekt" randomly selected from the members. Limited editions A and B also include a randomly selected "Premier Class Objekt." Additionally, this edition comes with a photo book.