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.
Complete Reika's Story.
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.
Gift all Victoria items.
Gift all Reika items.
Gift all Mai items.
Complete Satomi's Story.
Gift all Aria items.
Meet Victoria.
Gift all Sara items.
Unlock Shibuya.
Earn the fifth star at Quickie Love Hotel in Roppongi.
Gift all Toshiko items.
Meet Aria.
Unlock Harajuku.
Gift all Satomi items.
Gift all Professor Belmont items.
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.