I never expected to have my niece Marie stay at my house. She looked cute and innocent, like a perfectly pure girl. But behind that facade, she had a secretly erotic, mischievous side. Ever since the day I accidentally caught her masturbating, my life has changed—I've become her sex slave, completely under her control. Her charm goes far beyond that of a mere beautiful girl; she's turned me, her teacher, into her plaything, drowning me in a depraved relationship. Marie teases, "If you want to keep this a secret, you'd better play with me every day," and I can do nothing but obey, living each day at her mercy.