Cross the Moon (US)

This is a visual novel but you don't pick any choices. You just skip through with RB and you need to press B on the images with shells on them when the auto skip stops. This achievement is for pressing B on the red tea cup image

You can see this in my video at 1:50

Volume 1: 1:00
Volume 2: 1:25
Back Side A: 1:35
Volume 3: 1:40
Volume 4: 1:50
Back Side B: 2:05
Volume 5: 2:10
Volume 6: 2:20
Flesh Side A: 2:30
Volume 7: 2:35
Volume 8: 2:45
Flesh Side B: 2:55

Achievement Walkthrough: