Imagine a girl suddenly appeared inside your bedroom. You look at her face. There is a subtle similarity between both your faces. The texture, the harsh look, and the way she snores, it annoys you but you feel familiar with this girl. When she wakes up, she claimed that this is her house, and you are intruding. When you asked her name, she has the same family name as you, yet you do not have a sister, and she does not have a brother. She is suffering in the same way you are, and she is also as lonely as you are. What would happen between both of you if this scenario occur?

This is a story about a protagonist who meet his female version from the alternate reality.

Edit 1: Age rating changed to 18.

Edit 2: Encountered a problem in some cases which Miyako might identify herself as a woman in a male body. Character definition changed