I was completely drawn in by the shocking premise! The storyline where the prestigious Yumika family, known for generations of daughters, unexpectedly gives birth to a boy due to a mutation, and raises 'Yūri' as a girl to hide the secret, is truly dramatic. Combined with the setting of an elite all-girls school, the unique world where tension and immorality intersect is captivating.

Particularly, the presence of Hatano Yui as the perverted lesbian teacher adds depth to the work. Her performance, exploiting 'Yūri's' weakness to treat her as a sex toy while hinting at affection, showcases the prowess of a veteran actress. Her high expressiveness, adaptable from lesbian to cross-dressing genres, is commendable.

Yumika's portrayal of 'Yūri' maintains elegance without vulgarity, and the slightly more robust physique, possibly due to hormonal influences, feels realistic. Despite this, the interactions between the two throughout the film are highly erotic, fully evoking a sensual atmosphere.

One point that caught my attention was the costume during anal sex scenes, which looked like a fundoshi loincloth. Whether this is due to aging or intentional direction, interpretations may vary among viewers. However, the soft texture of the breasts is outstanding, with touches that make you want to reach out, scattered throughout.

Overall, it's a quality work where the bizarre setting and skillful acting blend perfectly. The dangerous relationship between the two, burdened with secrets, comes across with intense heat through the screen.