What Do I Do If My Brother Is a Stud? [GB]

Female Beta x Male Omega. A sensitive, easily tearful older brother x a mischievous younger sister with a wicked sense of humor.

Their parents were too busy with work, so their older brother raised her.

Though her brother is a gentle Omega who speaks softly, a lot of the time he's more like an Alpha than an Alpha. Even before he presented, he secretly went to underground boxing matches without telling his sister.

After becoming an Omega, her brother grew gentler. He looks so gentle when he comes out of the kitchen wearing an apron, even if it's only on the surface.

*

When she was little, her brother was like a mother to her. He'd make her bottles, cook for her, and take her to amusement parks.

Now that she's grown up, her brother is a little shy. But whenever she asks, he'll still undo his shirt and let her drink his milk.

Sometimes her brother gets a little moody. When she says she's going on a date with an Omega friend, he'll gaze at her with his beautiful eyes. If she really goes, he'll hide away and cry all afternoon.

His sister can't stand to see him cry, so she usually turns down the date.

Sometimes her brother leaves her utterly baffled. For instance, when she presented as a Beta, he cried for ages, and nothing she did could comfort him.

And during his heats, he always asks her to stay with him.

His sister knows enough about biology to want to say no, but when she sees her brother's eyes, the refusal catches in her throat.

His beautiful eyes are just too prone to tears.

He begs her to touch him, pitiful, fragile, and utterly humble.

His sister obediently strokes his head.

Then her brother cries even harder.

*

But a lot of the time, her brother is just too lewd.

When his sister had just come of age, he liked to put an arm around her neck, sit on her lap, and force her to soothe his gland.

He keeps crying, even as he blames her. "I saw an Omega give you a love letter today. You can't say yes."

His sister strokes his hair and tells him she didn't say yes.

She accidentally touches a familiar spot, then gives it a few mischievous pinches.

Her brother lets out one breathy moan after another.

His sister can't help laughing. Wanting to tease him a little more, she asks on purpose, "Brother, why are you so lewd?"

Their first love, the siblings aren't registered in the same household, no blood relation, a twisted love.

(Blurb written on 2025.12.11, to be revised.)

Theme: Of course it's his fault for falling in love with his sister