This work closely follows the journey of Rin-chan, who has never experienced internal ejaculation, until her first time. During a director interview, she conveys her intention to challenge internal ejaculation and expresses her anxiety. She goes to the hospital for a check-up and receives a thrilling test result report a few days later. On the day of the shoot！！Rin-chan, who is nervous, experiences a simulated internal ejaculation using an adult toy, and finally, it's time for her first ever！Real internal ejaculation SEX！！Pay close attention to Rin-chan's mix of tension and anticipation in her first experience！！
