The domineering single woman who moved next door was turned into a sex toy by those brats - Natsume Sayuri HBAD-507

Masagaki falls in love with her older sister, who moves into the same apartment building. However, she is a proud, cold, and disdainful single woman. Masagaki uses her illegal garbage disposal as a joke to attack the domineering woman and sexually prank her. The kids threaten these domineering women, forcing them to perform oral sex, forcing them to drink semen, inserting their penises into them, using them as sex toys, and drowning them in their penises.