Ep. 3: Separation

3

Kaoru desperately tries to stop Aoi from coming in to scrub his back, but she does anyway. While trying to get Aoi to get out Kaoru slips knocking them both to floor and ends up grabbing Aoi's breast by accident causing Aoi to scream. As if things can't get worse a woman bursts in the room and sends Kaoru flying. Who is this woman and what connection does she have with Aoi? (Source: Wikipedia)