: The series concludes with several unanswered questions, showing a future where Hachi and her friends gather at their old apartment, still waiting for Nana O., who has gone missing.

: Hachi discovers she is pregnant. While the biological father is uncertain (between Takumi and Nobu), Takumi steps up to take responsibility, and they eventually marry. This choice creates a deep rift between Hachi and the BLAST members, particularly Nana O.. The Anime vs. Manga Ending

The anime and manga provide different levels of closure as the series remains on an indefinite hiatus due to the author's health.

: Early in the story, Hachi’s world is shattered when Shoji cheats on her with a coworker, Sachiko. Devastated, Hachi leans on Nana O. for support. She eventually becomes involved with Takumi Ichinose, the leader of Trapnest, and briefly with Nobu from BLAST.

: A tough, ambitious punk rock vocalist determined to find fame with her band, Black Stones (BLAST) . She moves to Tokyo to reclaim her career and her past love, Ren Honjo, who left her to join the famous rival band Trapnest . Key Plot Developments

: While Nana O. works to debut BLAST and compete with Trapnest, Hachi becomes a bridge between the two groups. The rivalries and internal tensions of the rock world begin to strain the friendship between the two Nanas.