The invention is generally directed to a bathing assembly that allows for conversion between a bathtub and shower as desired by the user. The assembly includes a bathtub insert positioned on one of the bathtub sidewalls. The insert is watertight and allows the bathtub to function fully when installed. The insert can be easily removed from the bathtub sidewall, allowing access to the shower stall with minimal step over barrier. A hanger is positioned on one wall of the shower stall to retain the insert until it is needed again (e.g., when a user desires to take a bath). The assembly further includes an overflow drain positioned in the bathtub sidewall opening created when the insert is removed, acting as an added safety feature when the shower is in use. The assembly therefore allows a user to enjoy the benefits of both a walk-in shower and bathtub without requiring major renovations or costly updates.