Just my guess, maybe Byul indeed is an alpha maybe a special case like futanari like manhwa Low Tide In Twilight where Taejoo's dad an alpha but he can give birth to babies since he's futanari... Just my guess ok, cuz Hyesung first thought he's an alpha too but it's impossible since his body totally looks like an omega... This is just my guess
Just my guess, maybe Byul indeed is an alpha maybe a special case like futanari like manhwa Low Tide In Twilight where Taejoo's dad an alpha but he can give birth to babies since he's futanari... Just my guess ok, cuz Hyesung first thought he's an alpha too but it's impossible since his body totally looks like an omega... This is just my guess