Hirano had been dating her beloved Hirakawa for three months, spending every day grinning from ear to ear, overwhelmed by happiness. Then Hirakawa made her an offer. “Hirano, wanna come over to my place today? My parents won't be back until late. It's our chance... for sex...” Hirano had always been attracted to women but Hirakawa was different. Was this really okay...? As Hirano hesitated, Hirakawa dropped a terrifying line. “If you won't let me have sex with you, Hirano... I might just go find someone who will.” Hearing that, she had no choice but to go through with it! She'd been practicing for this day, which she knew might come someday. She'd lead her coolly and confidently!!! But when the moment actually came, her mind went completely blank... At this point, she had no choice but to follow her instincts...! Yet, surprisingly, it went well... And that's when she understood the meaning of sex...