Driven by a genuine curiosity to understand Japanese men, 22-year-old Riina Nishihara makes her bold debut with S1 No.1 Style. Her sun-kissed, healthy beauty radiates a captivating charm that instantly draws attention. While she's had relationships with two foreign men, she's never kissed a Japanese man before—making this her first experience with a Japanese man's body, and her first time feeling semen released up close. Fueled by pure curiosity, this debut captures her innocence and sincerity in full, delivering an authentic, raw eroticism brimming with natural allure. Released as an exclusive two-part limited series under S1 No.1 Style, this rare debut is a must-see.