Hanayamata by Hamayumiba Sou — Ongoing

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Chapter 1 released Sep 2 '13
Chapter 2: I Will Rock You! released May 30 '14
Chapter 3: The cat and mouse game released Jun 13 '14
Chapter 4: Hide-and-seek released Jul 6 '14
Chapter 5: Seduction Operation released Jul 15 '14
Chapter 6: A Kind Yakuza released Aug 17 '14
Chapter 7: First Steps released Aug 24 '14
Chapter 8 released Dec 5 '14