MIDD-981 - Female teacher Saki Ninomiya gets gang-raped by her students

There are four rape scenes, but they lack any tension, like melted soft-serve ice cream. She gives in way too easily when approached by students, and there's no variation in her expressions or lines, so the sense of fear or reluctance never comes across. The final scene involves multiple people using toys to ravage her, but there's no screaming or squirting, and it ends without any penetration or oral stimulation. It's a total fizzle—honestly, I'm disappointed.