Period | PJM ff

Min Hyojin lives in a world where period is a disease.
Only 1 out of 100,000 women have period, and it is considered a very scary illness.
From the moment a woman turns 12 she has the chance to get period, but if you passed the age 18 without getting period, be happy! You're free from any fear of getting period.

So when Hyojin almost passes those 6 years without getting her period she can't be more happy.
but what if, she gets the thing she fears the most, day before her 18th birthday?
Will it change hers relationship with her best friend Jimin?
Well, no one could know.