I reworked the translations a bit, but I'm still unsure what Hakakawa refers to. I suspect it's a made-up word the author uses to refer to this particular style of clothes, and translated it under that assumption.
Patchouli Cherry ModelTop: 5900 YenBottom: 5600 YenSpringLike blooming cherry trees in a serene spring season, choose this fleeting image of beauty!The trend this spring is Hakakawa.
Would you like to assault her!?
hakakawa = the cuteness of making someone not wear panties.