During her university days, she gave birth and raised her son as a single mother after divorce. Now, her son is also a university student. Kaede goes on a hot spring trip with her son. Kaede is happy about her son's growth, but her son has something to tell his mother during this trip. The son had been conscious of his mother as a woman. 'I like you,' the son tells his mother and pursues her. Driven by instinct, he forces himself on her. Kaede resists at first but eventually succumbs to pleasure, agreeing to 'just for today' with a one-night promise, and they engage in repeated incestuous acts during their forbidden hot spring trip.
