Here is the full list of all 100 Topless Hentai Mosaic achievements.
Undressed!
T
O
P
L
E
S
Without Outerwear
Without a bra
<3
Without underwear, <3
Without outerwear
Outerwear
Cho, 24
Hoshi, 21
Kaiyo, 23
Matsuko, 22
Anzu, 24
Chizu, 23
Ai, 21
Asuka, 20
Amaya, 22
Umi, 20
Sango, 24
Suzume, 22
Ruri, 21
Haru, 23
Akari, 20