Here is the full list of all 86 Lust Academy - there are Season 1 achievements.
Return 10 Lost Folios to Amelie
Apply a potion during a duel
Mix a Reflection Potion
Return 5 lost folios to Amelie
Summon Leona through the sorting book
Save Elijah's brother
Win Duel
Defeat the student from Adderin in a duel.
Mix a Lesser Heal Potion
Catch 25 fishes for Gordon
Catch 50 fishes for Gordon
Catch 30 fishes in one fishing trip
Take additional class from Victoria
Make love with Hayley on the beach
Go to a desert island
Sneak peeks at Molly in the morning
Agree to help Lily lead Leonheart to victory
Return a lost folio to Amelie
Click on the ducks in the bathroom at Leonheart campus
Do not sneak a peek at Ashley
Become a participant in the tournament
Find out the truth about your parents
Take Haley on a second date
Sleep with Audrey in her true form
Save Cordale from destruction
Get the Lion's Seal
Go on a date with Adele
Help Amelie deal with the Elves
Make love with Lily at the Academy
Reject Lily at the Academy
Get Samantha to help with the ritual
Defeat the phantom soulstealer
Get bitten by Vanessa
Get in the VIP with Sadira
Kiss Samantha after the party
Don't take advantage of Samantha's weakness
Make love with Naomi at the library
Reject Naomi
Run into Samantha in the bathroom
Reject Audrey
Agree to have sex with Audrey
Find out the truth about Audrey
Get into a secret room
Meet Mushroom girl in the forest
Make love with Lily in the forest of mushrooms
Reject Lily in the forest of mushrooms
Spy on Amelie
Have your first kiss with Hayley
Agree to help Haley investigate E. Bloom mystery
Volunteer for Victoria's class
Take Audrey to a closed cafe
Stick your fingers in Lily's panties
Have your first kiss with Lily
Get a massage
Get in the VIP with Lucy
Drink Vanessa's signature cocktail
Save Adele from Diego
Win the weekly house competition
Get a blowjob from Naomi
Learn a combat bolt
Steal the answers to Naomi's test
Agree to help Naomi with her potions
Prove to Naomi that you are worthy of her
Get milk for Audrey
Kiss Samantha on the lips
Get the highest tip possible
Correctly name the potion recipe in Sabrina's class
Ask Haley out on a date
Find books for Lily
Get a job at the cafe
Attend Sabrina's first class
Attend Victoria's first class
Get textbooks from Ameliе
Get on Leonheart house
Pass the exam and enter the Academy
Find out about houses in Cordale
Comfort Hayley
Read someone's thoughts
Sneak a peek at Ashley
Get a letter from the Academy
Click on the rubber ducks in the house
Complete Season 1 main storyline
Catch 100 fishes for Gordon
Win 5 Duels
Win 10 Duels