A high school boy wakes up to find a torture device in human form standing naked in his kitchen, and somehow this is the least weird part of what's about to happen. Fear isn't playing the submissive love interest, she's a sentient implement of agony learning what it means to stop being a weapon, and every fight she takes on is her refusing to be what she was made for. The 12 episodes move too fast and the harem setup is by-the-numbers, but the core idea, a girl made of curses trying to become human, carries enough weight to make you care when everything else is just noise.
Haruaki's quiet life shatters when his father ships him a mysterious black cube. He wakes to find Fear, a naked girl with a cryptic past, materializing in his kitchen. She's not human. She's the cube itself, a sentient torture device that has somehow gained consciousness and chosen to abandon her dark purpose. Now she needs Haruaki's help. His body carries an unusual immunity to curses, making him the perfect partner for what comes next. Together they hunt down other cursed objects scattered across the city, each one a weapon of suffering bound to a human master. As they battle through increasingly dangerous encounters, a strange bond forms between them. Fear struggles to shed her identity as an instrument of pain while Haruaki grapples with protecting someone born from malice itself. The series balances genuine action and supernatural conflict with comedy that emerges from Fear's shock at normal life and their awkward domestic routines. It's a show that grounds its high-stakes battles in the messy reality of two unlikely people learning to coexist.