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