本作启用了包括中原麻衣、石川界人，细谷佳正、柿原彻也，鸟海浩辅、松冈祯丞等知名声优的豪华阵容，玩家可尽情享受全语音所带来的游戏乐趣。

本作的剧情发生在一幢奇妙的洋楼里，以充满戏剧性的爱情故事为展开，属于悬疑类幻想风格。游戏内容分为文字剧情和狩猎黑蝶两个部分。主要玩法概括起来就是狩猎黑蝶获得分数，并使用分数解锁想看的剧情章节。解锁的章节内容会依据主线剧情的进度发生变化。

另外，与以往的乙女游戏有所不同，本作不会明确区分每个角色的攻略路线，而是随着故事的进行，直接进入角色的结局。同时搭载了方便玩家游戏的系统，确保了畅快的游戏体验。 As she fell deeper and deeper into the darkness, she could hear the sound of rainfall. Also, she heard an animalistic cry.

When she woke up, the young girl found herself in a Western-style mansion. An unknown, terrible monster rushes to attack the confused girl. As the young girl ran away from the monster, she thought: “Where is this place ” “Who am I, anyway ”

Having lost pretty much all of her memories, she eventually met and joined up with some men in the