Here is the full list of all 13 Otoko Cross: Pretty Boys Breakup! achievements.
Played the game for the first time
Cleared all Dakota stages
Cleared all Jules stages
Cleared all Haru stages
Cleared all Faren stages
Cleared all Quincy stages
Cleared all Morgan stages
Cleared all Sydney stages
Cleared all Kyun stages
Cleared all Bao stages
Played Eternal Challenge stages
Completed all Point Exchange items
Completed all stages in PrettyBattle mode