A highly unique project is underway, where participants' feelings of shame while watching themselves defecate in a mirror are monitored in real time via heart rate measurements. However, there's an even greater surprise hidden within this experiment: the mirror is actually a one-way mirror, and on the other side, cameras are set up without the participants' knowledge. Sitting astride a custom-built toilet seat, they squat and see their own naked genitals exposed in the front-facing mirror, caught in the vulgar act of defecation. Their inner emotions are revealed through fluctuations in heart rate, clearly showing a complex mix of humiliation and arousal. Glimpses of self-obsession and narcissism emerge, exposing the intricate psyche of young women. As a thank-you for the project's massive success, one additional participant has joined. The defecation acts are recorded in an extremely practical format, capturing everything—assholes, faces, genitals, and feces—all together in one frame. 【marina】 A cute, older-sister-type character. Alternating between natural straining and enemas, she shoots out yellow feces with a splattering "plop plop" sound. During defecation, she murmurs, "It's so embarrassing... I feel like an animal..." Yet, subtle signs of arousal can also be seen. 【shiori】 An elegant, refined older sister type. After receiving an enema, she vigorously expels large amounts of feces. She also displays a scientifically analytical side, routinely observing and analyzing her own bowel movements. Her embarrassment turns her heart rate monitor orange. 【honoka】 A consistently calm and composed girl. While watching her own anus during defecation, she comments, "It looks like a tube... (it really was)." Even during interviews, she reveals a strong mental fortitude, calmly mentioning when she feels hungry. 【airi】 An older sister-type with a normally low resting heart rate of around 50 bpm. After letting feces dribble out, her heart rate climbs to the 70s during the interview, clearly conveying her nervous excitement. 【Ichimonkai staff urara】 A constipation-free girl who expels massive amounts of urine and feces. Her bladder screams in relief, causing constant fidgeting. After enjoying a satisfying bowel movement, she becomes extremely embarrassed upon realizing her workplace colleague has seen her defecating. The main video is recorded with full facial exposure.
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