My Kouhai Who Doesn't Get Along With Me, Sexually Harassed Me on the Train

Two coworkers who usually do not get along end up riding the same crowded train. The younger coworker takes advantage of the situation to sexually harass his senior, discovering that the older man is secretly wearing a vibrating toy. Realizing the senior is also wearing a butt plug, the junior coworker escalates the situation by using a hypnosis app on him. Under the influence of the app, the junior leads his senior into a public restroom and sexually assaults him.