On the eve of her 20th birthday, Haruka decides she wants to lose her virginity and signs up for the shoot. She has dated three men in total, but broke up with two of them without even sharing a kiss. Her only experience was during her schoolgirl days, lasting just two days—she refused intercourse but performed fellatio, experiencing six creampie ejaculations. Since then, she hasn't been in any relationship, and before she knew it, she was standing at the threshold of her twenties. With a modest B-cup chest, she's self-conscious and blushes instantly when looked at. She endures penetration through tears, discovering the joy of first-time sex. Her pure, innocent heart trembles with this first intimate experience. Her mix of anxiety and anticipation enhances the appeal of this production.