Here is the full list of all 31 Quickie: A Love Hotel Story achievements.
Complete Sara's Story.
Complete Toshiko's Story.
Complete Professor Belmont's Story.
Earn the fifth star at Quickie Love Hotel in Roppongi.
Earn the fifth star at Quickie Love Hotel in Akihabara.
Earn the fifth star at Quickie Love Hotel in Harajuku.
Earn the fifth star at Quickie Love Hotel in Shibuya.
Gift all Toshiko items.
Gift all Victoria items.
Gift all Aria items.
Gift all Satomi items.
Gift all Reika items.
Gift all Mai items.
Gift all Professor Belmont items.
Gift all Sara items.
Complete Satomi's Story.
Complete Reika's Story.
Meet Victoria.
Unlock Shibuya.
Meet Aria.
Unlock Harajuku.
Earn the fifth star at Quickie Love Hotel in Shinjuku.
Meet Toshiko.
Unlock Akihabara.
Meet Mai.
Unlock Roppongi.
Meet Sara.
Meet Professor Belmont.
Complete the Introduction!
Meet Reika.
Meet Satomi.