The Boy Of Promise

Heir to a brutal Yakuza clan long thought erased, Ryuji walks the school halls like a ghost—quiet, cold, untouchable. In the underworld, they whisper his name: The Black Vow—a living curse, bound to a promise written in blood.

His target? The syndicate that slaughtered his kin.

His obstacle? Their daughter… the only one who’s ever seen through his silence.