Here is the full list of all 20 My Escort Company achievements.
Hire Umi
Hire Sora
One of your girl reached level 3!
Hire Nari
Hire Chio
Complete 50 requests!
Hire Mai
Hire Kanaye
One of your girl reached level 2!
Unlock your first special video! Check the Gallery!
Unlock your first pose/outfit! Check the Gallery!
Open 10 rewards/Spend 50 stars!
Unlock your first cutscene! Check the Gallery!
Open a new Area!
Hire Rini
Purchase an upgrade!
Hire Hayami
Finish the tutorial!
Hire Aki
Create your Escort Company