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!
Be Baptized by Angels.
Witness Simon's Transformation with Diana and someone special...
Impress the House Party Guests.
Be Eaten Alive by Diana's Pit Beast.
Obtain True Freedom.
Obtain True Power.
Get Shot in the head by Malix.
Start your Adventure with Diana.
Get Proposed to by Andrew.
Go To Paris with Naomi.
Find Harold Anderson's Magic Books.
Prove Your Love to Suzu.
Fight Malix Yourself.
Share some Cake with Matthew.
Accept Sam for the Man he is.
Kiss Erik under the Moonlight.
Get Proposed to by James.
Give Damien his Humanity.
Turn down sex, but keep your true love.
Unlock the Second Set of Bloopers!
Unlock the First Set of Bloopers!
Dodge Malix in time.
Prologue Completed!
Rename the Main Character.