Here is the full list of all 31 Quickie: A Love Hotel Story achievements.
Complete Reika's Story.
Meet Satomi.
Meet Reika.
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 Sara.
Meet Mai.
Unlock Roppongi.
Meet Professor Belmont.
Complete the Introduction!
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 Satomi's Story.
Complete Professor Belmont's Story.
Complete Toshiko's Story.
Complete Sara's Story.