4 ideas
A young woman keeps a flat, clinical diary of her older sister's pregnancy, recording morning sickness, cravings, and the sister's physical transformation with detached curiosity. After reading that imported grapefruit may carry a pesticide said to damage chromosomes, she keeps making her sister grapefruit jam from that fruit, and the sister eats it greedily.
Aya, a teenager raised in the religious orphanage her parents run, spends hours secretly watching her foster brother Jun practice diving and longs for him in silence. In the same period she privately torments Rie, a toddler at the home, in small hidden ways. The two behaviors run side by side, and her cruelty surfaces when Jun lets her know he has seen what she does.
Read an act of petty cruelty as the outlet for a desire or resentment the person cannot voice, not as an isolated moral failure. Aya cannot claim Jun, and the diarist cannot say what she feels about her sister's changing body.
Menace is sharpest when told in calm, precise, sensory prose about ordinary things like food, bodies, rooms, and routines, with the dark act never named. In the dormitory novella, a woman returns to her old college residence, run by a manager with no arms and one leg, where a student has vanished and something seeps through the ceiling. Nothing is explained, so the reader's own inference supplies the horror.