During the boring days of hospitalization, an unexpected savior appeared! The fourth installment of the sensory AV, where Yui Koshinosaka plays a nurse who unleashes her wild side hidden beneath the white coat, is a must-watch that I personally viewed and found utterly addictive.

From the start, Yui-chan boldly presses her plump, beautiful buttocks against the face, seducing with a sweet voice, 'Get energized by the smell of my anus, okay♪' Her audacity leaves one breathless; after removing her panties, she immediately mounts the face, quivering her anal hole provocatively. The teasing line, 'Is my butt hole smelly? If it is, tell me~?' draws viewers in irresistibly. Spreading her legs wide in a face-sitting position, she rubs the raw scent of her anus against the nose, reaching the pinnacle of sensuality. The scene where she extends her tongue and thrusts it deep into the anal hole, twisting it in centimeter by centimeter, is so realistic it's hard to look away.

Her climax to the point of incontinence from pleasure and the frenzy of gulping down urine fully showcase Yui-chan's erotic appeal. Once fully aroused, she stealthily engages in raw penetration in a cowgirl position, leading to a creampie in a naturally escalating flow. In a later clinic scene, her role as a seductive nurse shines as she makes others smell her sweaty anus. Laughing while saying, 'My anus is super smelly today, you know♪' and exposing her quivering, intensely odorous anal hole with toilet paper still attached is both lewd and charmingly playful. Her dedication in squatting down to lick and clean deep inside the anus with her tongue earns spontaneous applause.

The scene where she uses her marshmallow-soft breasts to jerk off the penis, leading to an uncontrollable titty-fuck climax, is an irresistible highlight for big-breast fans. On discharge day, her explosive release of pent-up sexual desire with the line, 'Did you save up your cum properly? Lol,' as she greedily devours with tongue and penis, is overwhelmingly intense. Squatting over the face and performing self-piston movements to thrust her tongue in and out of the anal and vaginal holes seems almost insane, but Yui-chan's acting skill makes it strangely believable.

The thoroughness of marking with the smells and tastes of saliva, toes, navel, anus, and vagina hits the core concept perfectly. The climax, where she reveals an ecstatic expression during anal cunnilingus sex, quivering her anal hole fully exposed in satisfied orgasm, excites no matter how many times it's watched. The tenderness of applying cum to every single wrinkle of the anus after multiple internal ejaculations also highlights her character depth.

Overall, this work fully utilizes Yui Koshinosaka's large breasts and big butt, with her seductive performances exposing both vagina and anus being incredibly arousing. She perfectly embodies the sexy, lewd nurse role, captivating viewers with top-tier skill. However, some scenes where the male actor talks too much can be distracting; more silent direction to preserve the atmosphere might have enhanced immersion. Still, the innovative concept and the actress's passionate performance make this an unmissable piece.