Here is the full list of all 29 Hentai House achievements.
Gift first item
Get 5 hearts Mia
Get 4 hearts Mia
Get 3 hearts Mia
Get 2 hearts Mia
Get 1 heart Mia
Gift 30 items
Get 5 hearts Rina
Buy 30 items
Get 4 hearts Rina
Gift 25 items
Get 3 hearts Rina
Get 2 hearts Rina
Gift 20 items
Buy 25 items
Get 1 heart Rina
Gift 15 items
Buy 20 items
Get 5 hearts Sophia
Get 4 hearts Sophia
Gift 10 items
Get 3 hearts Sophia
Get 2 hearts Sophia
Gift 5 items
Buy 15 items
Buy 10 items
Buy 5 items
Get 1 hear Sophia
Buy first item