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