One day, the protagonist's secret account is discovered by her boss and is asked to have sex with him. A junior happens to be there and tries to stop him. However, when the boss provokes the junior, somehow the two end up fighting over the protagonist...!? She is sandwiched between her well-built boss and junior and is unable to move properly as they stimulate her clit and finger her, and even though she is on the train... she cums helplessly... The protagonist's body responds to the relentless foreplay, even though it is in a public place, and gradually her desires are revealed...