Akaiito 是一款日本冒险游戏。游戏以现代为背景，以拥有特殊血统“Nieno Chi”的女孩鸠圭的视角展开。使用一种称为吸血系统的特殊系统。
该游戏是冒险游戏，用户需要使用鼠标或控制器在故事中移动或选择选项。游戏中没有复杂的操作。根据你的选择，故事的发展将会改变，主角的命运也会改变。
本游戏共有32种结局。其中15个是坏结局，12个是正常结局，5个结局是真结局。
清除一些根后，会添加新的选择，可以看到新的故事，这个系统称为“根印”。
故事
在她唯一活着的亲人——母亲去世后，今年夏天，惠在整理她的遗产时，得知已经去世的父亲在一个名叫“半冢”的鲜为人知的地方拥有一座古老的日本宅邸。
凯决定进行调查，以确定这个被遗忘的家园的前景。
途中，惠做了一个奇怪的梦，梦见一棵大树刺破天空，一个名叫由美的女孩
带着一群蝴蝶出现。
半泉山的山神和人祭的传说是什么？
凯失去记忆的真相是什么？
半冢是圭的出生地。当人物相遇时，命运的齿轮悄然转动……
主角
Kei Hatō Kei
故事的主角 Kei 是一个相当粗心的人，考虑到她最喜欢的一句话是“永远做好准备”，这很讽刺。
Yumei
惠梦中的神秘少女。
卯月千
场 鬼杀者圭在火车站相遇，她的剑是鬼的克星。
若杉都
年龄只有惠一半的女孩，身边有一只白狐。凯在她父亲现已废弃的房子里遇见了她。
浅间咲也 圭
已故母亲的朋友。她的绰号是“韦斯特”。
希美、御影
双鬼以及故事中的对手。
Kei
一位神秘的男性，后来被称为 Kei 的兄弟 Hakuka。
Akaiito is a Japanese adventure game. Set in the present age, the game unfolds from the point of view of Kei Hato, a girl who has a special blood called "Nieno Chi". A special system called the blood sucking system is used.
This game is adventure game, users need use mouse or controller to move on the story or choose the selection. There is no complex operate in the game. Depend on your choose, the story development will change, and the fate of main character will change too.
There are 32 ending in this game. 15 of them are bad ending, 12 of them are normal ending and 5 ending are true ending.
After clear some root, new selection will be add, and you can see new story, this system is called “root seal”.
Story
After the death of her only living relative – her mother, this past summer Kei was sorting through her inheritance and learned that her father, who had already passed away, owned an old Japanese mansion in a little-known place called “Hemizuka″.
Kei decides to investigatein order to determine the prospects of this forgotten homestead.
On the way there, Kei has a strange dream in which a huge tree pierces the sky and a girl named Yumei appears
with a flock of butterflies.
What is the legend of the mountain god and human sacrifice in Hemizumika?
What is the truth of Kei‘s lost memory?
Hemizuka is Kei's birthplace. When the characters come across each other, the wheels of destiny quietly begin to turn...
Main character
Kei Hatō
The main character of the story, Kei is a rather careless person, which is quite ironic considering her favorite phrase is "always be prepared".
Yumei
The mysterious girl from Kei's dreams.
Uzuki Senba
The Oni Slayer Kei meets at the train station, her sword is the very bane of the oni.
Tsuzura Wakasugi
A girl half Kei's age, accompanied by a white fox. Kei meets her in her father's now abandoned house.
Sakuya Asama
A friend of Kei's deceased mother. She goes by the nickname "West".
Nozomi , Mikage
Twin oni and the antagonists of the story.
Kei
A mysterious male, later known as Kei's brother called Hakuka.
