Here is the full list of all 30 Quickie: A Love Hotel Story achievements.
Complete Reika's Story.
Gift all Victoria items.
Gift all Aria items.
Gift all Mai items.
Gift all Reika items.
Gift all Toshiko items.
Gift all Professor Belmont items.
Meet Aria.
Meet Victoria.
Gift all Sara items.
Gift all Satomi items.
Earn the fifth star at Quickie Love Hotel in Akihabara.
Unlock Shibuya.
Meet Toshiko.
Earn the fifth star at Quickie Love Hotel in Roppongi.
Unlock Harajuku.
Complete Satomi's Story.
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.
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.