Long ago, your old friend Blue Oni did a Bad Thing to help you out. Their sacrifice helped the humans look past your monstrous nature and you were able to live in human society comfortably afterwards, though Blue Oni had no choice but to flee and live in the wilderness. Things went well for you for a time until you also became alienated from civilization, and decided to journey to find Blue Oni and make amends. Your Oni or group of Oni outcasts have tracked Blue Oni to an old abandoned structure that is home to various supernatural Yokai who also live outside of human civilization. In playing Sad Oni RPG you will explore this structure, develop relationships with its Yokai inhabitants, confront your own inner demons, and try to make amends with your long lost friend Blue Oni.