Black Card. (KuroKen)

In the bustling streets of Tokyo, an upscale businessman named Kuroo Tetsurou finds himself caught in the whirlwind of the city's elite. His days are consumed by captivating projects, manufacturing vital parts of space equipment for none other than NASA. As his work takes him far from home, an unexpected and magnetic force pulls him back to his neighborhood, his unassuming neighbor Kenma Kozume. Kenma, unlike Kuroo, has the luxury of inherited wealth. Kuroo ventures into Kenma's domain to complain about his noisiness, only to find himself ensnared in the depths of his neighbor's mind. A chance encounter leads to a restless night filled with passion and intricate intimacy. Kenma, wrestling with the echoes of their passionate embrace, yearns for more than fleeting moments in the night. With tentative steps, he musters the courage to confront Kuroo, igniting a journey that defies convention and expectations.