Here is the full list of all 15 Pub Encounter achievements.
Completed All Main Scenarios, Sequels, and Date Scenarios.
Completed with "Mamoru" Good Ending.
Completed with All Endings.
Completed with "Mamoru" Best Ending.
Completed with "Ryunosuke 2nd Season" Good Ending.
Completed with "Ryunosuke 2nd Season" Best Ending.
Completed with "Soichiro" Good Ending.
Completed with "Soichiro" Best Ending.
Completed with "Hideaki" Good Ending.
Completed with "Hideaki" Best Ending.
Completed with "Ryunosuke" Good Ending.
Completed with "Ryunosuke" Best Ending.
Completed with "Yorihisa" Good Ending.
Completed with "Yorihisa" Best Ending.
Completed the Prologue.