I keep coming back to this chapter. Kanna tells Koharu that if she builds enough karma, then Koharu will come back as a high schooler but Aki will still be a university student. That's 3 years for bachelor's and 2 more if she's going for a master's. If Kanna really was the cupid that followed Koharu in high school and made the couple at the beginning of chapter one fall in love (via heart grenade), does that mean Kanna's been around as a cupid for at least 5 years? Is Kanna close to her quota? Do they have different quotas to fill? Does she think Koharu will finish fast or is Kanna just going slow? Or because Koharu is good at this, will her karma build up faster because the stability of her matches are better?