A Sirens Call (BNHA Omegaverse AU)

Okumari Kirishima was never anything like her big brother Ejiro, he was tall, strong, handsome and nonetheless an alpha, where as Okumari was timid,shy and not relatively that strong physically, her quirk made up for it, none that really surprised anyone when she found out she was an omega... she thought with the way she was and more so the way her big brother is she'd be the only omega who doesn't end up having a mate... until the day she meets a certain friend of her brothers who she can smell his strong alpha scent radiating off him did I mention he was extremely attractive as well... she knew in that moment... she wanted him to be hers, but she was too shy. will her heat hitting at the wrong place and time be a blessing or a curse for her