After actually watching this work, I found it refreshing as a project-based film with multiple actresses appearing, which added novelty. The content was somewhat monotonous, but it covered various positions and was practically interesting. However, the scenes where actresses said 'I want to try this' were unnecessary, and it would have been better to focus solely on demonstrating the positions. In particular, Rina Chinatsu's performance was outstanding, making me wish for a solo work from her. On the other hand, Sana Matsunaga has a beautiful appearance and cute moans, but the project content was thin and left me wanting more. The last performer was the most impressive, with a development that made me want to see the continuation. Yet, while casting Rina Chinatsu is commendable, her youthful face made her miscast as an older sister role; changing the setting to an inexperienced older brother trying the 48 positions with an experienced younger sister would have been more natural. The lack of flexibility in the project and being constrained by the title limited its potential. Overall, the cast is appealing, but the underdeveloped project is a遗憾.