Kazuma arrives at the remote Kawarazaki residence deep within the mountains, accompanied by his lover Anna. The splendid mansion projects an unwelcoming presence to outsiders, yet it harbors residents devoted to their eccentric sensual pursuits. The sight of the maid Suzuka undergoing her training stirs unfamiliar longings in Kazuma. He finds himself irresistibly drawn to Miyahara Maki, their fervent attraction setting the stage for two days of extraordinary and abnormal experiences.