Here is the full list of all 10 Otoko Cross: Pretty Boys Klondike Solitaire achievements.
Played a first game of Solitaire.
Cleared Easy mode.
Cleared Normal mode.
Cleared Hard mode.
Clear all stages of Jules.
Clear all stages of Quincy.
Clear all stages of Haru.
Clear all stages of Morgan.
Clear all stages of Kyun.
Completed All costumes.