Don't worry, little girl. You're not losing a dad, just gaining a new mom.
And since she's your best friend, getting along with her won't be a problem anymore.
For once, there's a small semblance of things getting better. Kousuke and Miya actually have a chance to talk. The guy with her didn't try to keep him away or anything, and she didn't blow him off. Koto's mom seems like a much tougher case, but hopefully the police presence will keep her from doing anything too bad.