After Rindaman refuses his challenge, Genji encounters Katagiri Ken (Kyosuke Yabe), one of the yakuza who'd come to the school the previous day. He tells Genji that if he really wants to make an impression he should begin by defeating Rindaman, a legendary fighter at the school. The next day, Genji challenges Serizawa to a fight, but is halted by Tokio. Genji makes Hideo promise to acknowledge him as his successor should he succeed. He then goes to see his father, yakuza boss Takiya Hideo ( Goro Kishitani), to whom he proclaims his ambition to conquer Suzuran, a feat which Hideo himself had attempted in his youth, but failed. That night, Genji goes to a nightclub he frequents and meets R&B singer Aizawa Ruka ( Meisa Kuroki). Upon returning to the school, Serizawa witnesses Genji defeat the last of the yakuza. Meanwhile, Serizawa is visiting his best friend Tatsukawa Tokio (Kenta Kiritani), who has just been discharged from a hospital. The thugs mistake Genji for their target and a brawl ensues on the school field. During the freshman orientation assembly, yakuza arrive at the school seeking vengeance on third-year Serizawa Tamao ( Takayuki Yamada) for assaulting some members of their gang. Newly transferred high school senior Genji Takiya ( Shun Oguri) arrives at Suzuran All-Boys High School, an institution infamous for its population of violent delinquents.

2.4 Ebizuka Junior High Trio (First Year).

2.3 The Front of Armament (Second Year, Biker Gang).

Also, just to explicitly say you are being nonspecific about the lower bound. I think the notation is designed like this just to parallel the 'many' notation.

use 'zero or one' if it can be 0 or 1.

See how in both notations, being specific is just specifying the lower bound as 0 or 1.

Similarly, 'one' can mean 'zero or one' or 'one or only one'. You are leaving it unspecified because you don't know or don't care at this point in time. My conclusion, is that 'many' can mean 'zero or many' or 'one or many' because it is ambiguous on purpose. It also doesn't match valem's solution, because an artist isn't tied to one song and can be reassigned to other songs. This doesn't match with the accepted solution, because it doesn't mean that one artist performs all songs like how king arthur inhabits all palaces. Wikipedia also uses the double bar, 'one and only one' for one artist performing many songs. According to this answer to another question about differences in crow's feet notation, it says 'one' and 'many' are ambiguous.

Crows zero 3 dramanice