We are a small company started with the desire to introduce Japanese games that we have enjoyed ourselves to the rest of the world. We have received cooperation from the copyright holders, but I think there are many things we are not doing well. We would like to cooperate with you to improve our products in the future. This work is a translated and modified version of the game "Kagi wo Kakushita Kago no Tori -BIRD IN THE CAGE HIDING THE KEY" released in Japan. Story: A murder case occurred in the city. Touko Kujakuseki, a girl who is a benefactor of the main character, Youta Kawasemi, was arrested on a murder charge and she confessed her murder. However, Touko was released due to a lack of evidence. People around her didn't allow that, and she was imprisoned in a large Western-style building. Youta, who has lost her grandmother and lives alone, decides to live with Touko in a Western-style building. And Touko and her close girl, Mion Aobazuku and a class president Yoru Tsubamesawa, With the addition of Izuru Mizuha, an oddball in the class, a communal life with five people begins. They cook, stay in touch, have small conversations and quarrels ... Youta has come to like such a life. But the girl hasn't committed the murder. She is hiding someone. If that is true ... Who is the true criminal? Why is Touko trying to take the rap ... Is it possible to save a girl trapped in a bird cage?