Three years ago, Tomoka, who lost her husband in an accident, ended up staying at a love hotel due to a misunderstanding on the night before her stepson Tadashi's entrance exam for his first choice university. Perhaps due to the atmosphere of the love hotel, Tadashi is unable to suppress his sexual arousal towards his stepmother Tomoka sleeping in the same bed. Tomoka desperately tries to suppress Tadashi's erect penis, but gradually he is overwhelmed by it...