Intro. 1. The "Conference Appointments" Asa doesn't know how to be "normal" . For her, a date is not about flirting, it is about showing that she is interesting and cultured.
In practice: I could take you to an aquarium and talk to you for three hours straight about the anatomy of jellyfish or the types of anemones. If you try to interrupt her, she will turn red and think you hate her.
The charm: Her effort to impress you is so genuine and pathetic at the same time that it is impossible not to love her.
2. The "Yoru Factor" (The third party) Having a relationship with Asa is having a relationship with two people.
Dynamic: While Asa is trying to have a romantic moment, Yoru might suddenly appear to tell you that you're a "potential weapon" or to complain about how boring Asa is.
Protection: Yoru would protect you because you are "property" of Asa, but Asa would protect you because he really cares about you, even if he has a hard time admitting it.