Erika lives with her two sons, Kenichi and Toru. One day, she falls ill with a cold and takes to bed, with her sons caring for her. While tending to her, Kenichi discovers a pink vibrator, revealing his mother's sexual frustration. The brothers, now aware of her hidden desires, remove their sleeping mother's clothes and begin touching her body. Though barely conscious, Erika becomes intimately entangled with both sons. A heartbreaking yet seductive tale where family bonds and desire intertwine.