Here is the full list of all 16 Keyhole Spy: Schoolgirls achievements.
Have a good look at Olivia
Have a good look at Jane
Have a good look at Isabel
Have a good look at Lyubov
Have a good look at Lamai
Have a good look at Min-seo
Have a good look at Itsumi
Have a good look at all the girls
Collect 100 calculators
Collect 100 pencils
Collect 100 notebooks
Collect 100 scissors
Collect 100 palettes
Collect 100 glasses
Collect 100 globes
Collect 100 brushes