Here is the full list of all 13 Office lovers achievements.
Completed with All Endings.
Completed with "Haruyuki" Good Ending.
Completed with "Haruyuki" Best Ending.
Completed with "Akihito" Good Ending.
Completed with "Akihito" Best Ending.
Completed with "Sadayoshi" Good Ending.
Completed with "Sadayoshi" Best Ending.
Completed with "Ryo" Good Ending.
Completed with "Ryo" Best Ending.
Completed with "Mahiro" Good Ending.
Completed with "Mahiro" Best Ending.
Completed the Prologue.
Completed All Main Scenarios, Sequels, and Date Scenarios.