Angela
Angela is Mike's and Minami's mother. She visits them once during Minami event. Neither is she a romance option nor will she be one in the future.
Events
Dinner time
This event can either trigger with Bree or Minami
Prerequisites Bree: done Meet Bruce Gamer Bree or Maid Bree, Bree 
>= 85, invite her to a restaurant date
Prerequisites Minami : done Angelas Visit, Minami >= 90, invite her on a restaurant date
Mike and his date will spot some familiar faces on their date in the restaurant. If they follow them to the restroom, they will witness something obscene.
Outcome: If they followed them, Mike can ask about what they saw.
An urgent matter
Prerequisites: done Dinner time and followed them to the restrooms, interact with Bree
Mike will ask Bree if she can give him the phone number of her father.
If Mike didn't visit the scene in the restroom with Bree Mike needs 
>= 60 to convince her. (Optional)
After this event Mike has the following options on who to call:
You can find the option to call them in the Services tab of Mikes phone.
- Bruce
- Angela
- His father
Every one of those tells Mike something different but there is no consequence to either of these events.