AAAAAHHHH Why doesn't Akane just go to the police???! She was already literally kidnapped in that building and ran out to escape , so she must realise that avoiding getting kidnapped again is more important than the risk of her gang rape video getting spread.
The only other decent reason I can think of for not going to the police is if the gangsters threatened to kill her family, but even if they did , it's not like she'll be able to defeat them herself and going to the poolice and having them pick up her family is a better chance to take. I mean seriously, are the gangsters going to be following her family members 24/7??
And why did Akane call Ao one night to meet but not the next time the day repeated?