Kuro Gyaru-san ga Kuru!

Synopsis & Lore

A beleaguered office worker finds his way to a cafe where he decries the hardships of his routine. In there, a friendly gyaru high schooler notices his lamentations and after hearing him vent out, she cheers him up the "gyaru" way and they exchange contacts. What will become of this unlikely friendship? (Source: MangaDex)