This is the Reward for completing a mission. Once finishing the mission, post in the topic that the mission was made and request for the admin to add the Ryo to your account.

~D-rank: 100 Ryo
~C-rank: 200 Ryo
~B-rank: 350 Ryo
~A-rank: 500 Ryo
~S-rank: 800 Ryo