I actually watched the 4th installment of the super popular massage vocational school series, and from the mutual body-touching massage classes to the slippery massages, light lesbian scenes between female students, and the only male student's penis being repeatedly inserted by female students and the teacher, the charm of this gem series explodes. The female students featured in this work range from beautiful to cute types, and the teachers are all beauties; if such a vocational school existed, you'd definitely want to attend. The reason it sells so well is here—it's a highly satisfying masterpiece.

I bought this series for the first time, and the body wash massage scene was particularly impressive. Amid many oil-based massages, the foam massage felt fresh and good. I hope to see body wash massages in the next installment, and I'd like to watch scenes where the teacher instructs on making foam or teaching body wash massage. Initially, I thought the lesbian scenes were unnecessary, but after watching, they were effectively used, offering a fresh approach opposite to health check-up themed works, which was quite good.

Many are curious about the actress playing the teacher role, but the transition from lesbian to threesome scenes is irresistibly appealing. Having purchased from Part 1 to Part 3, honestly, this installment felt somewhat lacking in parts. As a favorite series, the selection and combination of actresses were disappointing, and criticisms like the models being subpar, with girls having dark nipples and weak amateur feel, are understandable. If it's the same pattern every time, the quality depends on the models, and girls with brown hair and sharp nails might not be needed.

I've seen all the works, but in this one, the freshness seen in the first installment has faded, making it more like a side story to traditional massage-themed works. The settings for each character aren't deeply explored, and it seems aimed at portraying a正统派 AV with SEX as the main focus. The emphasis is on buttocks and cowgirl position, making it acceptable as a simple AV for release, but if you expect the series' fun aspects, you might feel unsatisfied. The teacher role was good, but some opinions suggest pubic hair would have been better, indicating room for improvement in details.

Overall, if you're a fan of the massage vocational school series, this is a must-watch, with the body wash massage and lesbian scenes shining unexpectedly. However, it leaves challenges in model selection and pattern repetition, and to meet expectations for series evolution, the next installment needs to regain freshness. It's a good buy that won't disappoint, but I hope it aims for higher heights.