Here is the full list of all 36 Adorable Crush achievements.
Unlock Niko
Unlock Hina
Unlock Akari
Unlock Masami
Successfully finish 10 date
Successfully finish 25 date
Finish a final night date
Finish final night date with MASAMI
Finish final night date with SARA
Finish final night date with NIKO
Finish final night date with AKARI
Finish final night date with HINA
Give gifts to any girls 100 times
Earn 1500 or more Affection in a single move while on date
Finish final night date with every girls within 4 hearts
Collect 200000 Lovecens
Visit every locations
Finish final nightdate with every girl in hard mode
Use date gift 50 times
Buy every date gift
Get girl drunk and date with her
Accumulate 40 Joy in one date
Unlock at least 4 collection
Read every story
Get a super token with 3 token matched
Create a super token by 7 token matched
Create a 7 token matched without creating super token
Unlock every girl's preferences and details
Reach 5 hearts with every girl
Max all traits
Get every girl drunk at least one time
Successfully finish 10 challenge date
Successfully complete a date with at least 16 Moves remaining
Successfully finish the first date with any girl
Finish the prologue
Unlock Sara