Prehistoric Times: I Heard I Lost My Memory

My name is Tongtian, at least for now. I was inexplicably dragged here to take someone else's place, and I'm a little scared. I'm just a mortal who has to face the big shots! [Trembling] (′?ω?`) I'm completely baffled, living in this strange place... The person in my soul told me... I'm under house arrest, also known as [the little dark room]. I'm a bit panicked... No, I'm really panicked... Am I going to spend my whole life here without even getting to go out for a meal?