It's actually quite well written. Because it's too realistic physics and chemistry in the non-real world, which is what I don't like. So I didn't watch it later
The reason is that the showdown between the female protagonist and the male protagonist felt so awkward [laughing and crying] I still prefer that when the female protagonist wants it, the male protagonist gives it to her.
It looks good in the front, but in the back the heroine falls in love with the hero for no apparent reason. The setting of the male protagonist is really average and not worthy of the female protagonist at all.
I personally can't accept the idea of menstruation to promote the relationship between the male and female protagonists. It's very weird, you know? Moreover, at that stage, the relationship between the male and female protagonists was already very good, so there was no need to write about the female protagonist's dysmenorrhea as the male protagonist took care of it.