Tsugai no Senritsu: α Girai no Ω ga Kanaderu Nocturne

A faithful α violinist and an α-hating beautiful omega.

"I will never become mates with an alpha." Haruto (Ω), whose heat cycles occur more frequently than other Ω individuals, works at an illegal piano bar during his heats, playing the piano that holds memories of his mother. He also earns money by toying with α individuals, who usually act elite. However, during one performance, when he locks eyes with Naruse (α), a popular violinist who unknowingly visits the illegal establishment, his body is struck by a tingling sensation...

(Source: BisouBisou Comics)