Junko, for all her flair and youthful experimentation, is actually the daughter of a high-up VP at Qtronix. She’s been bred to inherit a small fortune. She is likely expected to marry the son of some executive of a larger company to improve her father’s chances at climbing up that last rung of the corporate ladder. This doesn’t necessarily bother her – it’s her lot in life – but it does make her feel like there’s a ticking clock on this exploratory phase of her life.
If you wanted to twist her arm, even a subtle hint at the ticking of that clock would likely get the job done.