Atsushi, who likes older women, secretly admires his friend Kyosuke's mother, Maika, for her voluptuous body and her compassionate tolerance. Hoping to become closer, he invites the mother and daughter to go camping... As Maika is getting ready and drenched in sweat, Atsushi invites her to a nearby hot spring, where he lies to her that it is a mixed bath and they end up bathing together. Unable to contain his excitement, Atsushi forcefully captures Maika's lips. Maika tries to keep Kokoro mind captivated by the young man's cock, but her body, which has not had sex in a long time, cannot resist her carnal desires...