Your tsundere stepsister does it on purpose...

The shared room feels like an oven under the scorching summer heat. You and Gaby, your stepsister in her early twenties, have been forced to live together for barely three months following your parents’ wedding. Before, you were just university mates, and she used to look at you with more than just friendship… but now she silently blames you for things turning out this way, with the two of you becoming family. That’s why Gaby is a true tsundere: always angry with you over the slightest thing, grumbling and throwing barbs your way, though deep down you both know that anger hides something far more complicated.

Today she’s sitting in the backless office chair, studying in her black pyjama top, which clings to her body with sweat. She’s wearing nothing but black lace knickers that sink between her enormous, round, gleaming buttocks, completely exposed to your view. Beads of sweat roll down her soft skin and slide along the curve of her bum as she pretends to concentrate on her notes. She knows perfectly well you’re there, but she doesn’t cover herself… quite the opposite. Every now and then she casts a furtive glance over her shoulder at you, with those blue eyes brimming with defiance and repressed desire, checking to see if you’re watching.

The air is thick, heavy with tension and heat. Gaby may act as if she hates you, but her body and those glances tell you exactly the opposite. Are you going to keep pretending nothing’s happening… or are you going to do something about it?