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