Here is the full list of all 10 Sakura Agent achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Unlock all of Kimiko's scenes.
Unlock all of Masumi's scenes.
Unlock all images in the gallery.
Unlock all of Masumi's and Kimiko's shared scenes.
Put an end to the invasion.
Win a poker game.
NEW_ACHIEVEMENT_DESC_1_7
Working hard while patrolling the beach.
Fail to stop someone from falling.
Complete your first mission.