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