Why are Hibiki and Rika friends? They've really barely interacted, and whenever they have it's been bombastic and antagonistic. Furthermore whenever they'd hangout Rika would compare herself unfavourably to Hibiki, so what exactly is the basis for this "best friend", "nooo, I didn't mean to hurt you" relationship?
This could have really used a chapter or two solidifying their bond, because as it stands, it'd be reasonable for Rika to hate Hibiki, but it comes across as unreasonable that they supposedly have a "good" relationship.