Amata and Mikono's relationship have the same weak basis as Bella and Edwards.
Amata and Mikono: A joke about waiting 12,000 years for each other.
Edward and Bella: Edward can't read Bella's mind. Although personally I don't think it's cause she's hard to figure out. I think it's just cause nothing's going on up there.
Basically it's love at first sight. Both relationships are laughable because of how poorly they're developed.
Puppy love
