Tsukasa moved in with her relatives due to a transfer. Ami, her younger cousin whom she hadn't seen in 10 years, was still the same serious and plain girl from middle school… When Tsukasa peeked at Ami's shower, she saw an unexpectedly voluptuous body! Seizing the chance when they were alone, she started seducing her. The sensitive and shy glasses-wearing girl reacted in an unexpectedly lewd way… A stupid and perverted incestuous lesbian drama!
