In a secluded room at school, Saki, a shy but academically gifted student, waits for her tutor, Hiroshi. Unbeknownst to her, Hiroshi has invited another student, the bold and sexually experienced Chisato, to join them in a "special study session". As they begin, Hiroshi steers the conversation towards intimate topics, clearly trying to arouse both girls. Saki blushes but remains focused on her work while Chisato teases her playfully.
As the session progresses, Hiroshi's advances become more explicit, and he starts touching Saki inappropriately under the table. Saki is taken aback at first but then becomes aroused by his boldness. Meanwhile, Chisato watches with interest, amused by Saki's obvious discomfort.
Eventually, fueled by lust and the power she holds over Saki, Chisato moves closer, her fingertips lightly trailing across Saki's trembling form.