Black Coffee and Bloodstains

Izuku Midoriya has always lived a quiet life.
He works at a small café, keeps his omega collar fastened securely around his scent gland, and has no interest in the dangerous world that exists beyond the streets he knows.
Then Katsuki Bakugo walks through the café door.
An intimidating man in an expensive black suit, Bakugo becomes a strange fixture in Izuku's life. At first, he only comes for black coffee. Then he starts coming back every day.
Neither of them understands why.
Izuku doesn't know that Bakugo is an Enigma, one of the rarest secondary genders in society.
He doesn't know that the man quietly sitting in the corner is part of one of the most powerful crime families in the city.
And Bakugo certainly doesn't expect the soft-spoken omega behind the counter to become the one person he looks forward to seeing.
For two months, their relationship remains nothing more than coffee, quiet conversations, and glances neither of them knows what to do with.
Until one night, Izuku closes the café late.
And witnesses something he was never supposed to see.
A drug exchange.
A murder.
A territory that doesn't belong to Bakugo's family.
Suddenly, Izuku's quiet life is gone.
The rival gang wants the witness dead.
Bakugo's family wants to know exactly what Izuku saw.
And Bakugo has to face the one truth he has been avoiding since the first day he walked into that café:
Izuku Midoriya isn't just the omega who makes his coffee.
He's become the one person Katsuki Bakugo would burn the entire city down to protect.