What's It Like to Live with a Girl Who Claims to Be Mine?

I'm Yang Yu, male, 20 years old. For some reason, I made a wish on my twentieth birthday. The next day, a completely inexplicable girl appeared in my bed.

Yang Yuqing: "Hey! Why are you living in my house, and why do you look exactly like me?"

Yang Yu: "This is my house. Get out, will you?"

This is a strange story about the same person from different timelines. An odd pairing of one mischievous girl and one utterly emotionless person.

(This is HEHEHE. Important things must be said three times.)