Here is the full list of all 25 Seduce Me the Otome achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Preview the start of Seduce Me 2: The Demon War!
Witness Simon's Transformation with Diana and someone special...
Be Eaten Alive by Diana's Pit Beast.
Be Baptized by Angels.
Obtain True Power.
Start your Adventure with Diana.
Get Shot in the head by Malix.
Find Harold Anderson's Magic Books.
Get Proposed to by Andrew.
Go To Paris with Naomi.
Prove Your Love to Suzu.
Fight Malix Yourself.
Dodge Malix in time.
Rename the Main Character.
Give Damien his Humanity.
Share some Cake with Matthew.
Turn down sex, but keep your true love.
Accept Sam for the Man he is.
Kiss Erik under the Moonlight.
Get Proposed to by James.
Impress the House Party Guests.
Obtain True Freedom.
Unlock the Second Set of Bloopers!
Unlock the First Set of Bloopers!
Prologue Completed!