Taffy's Sweet Dreams

I was at my cousin's house, in the basement. It looked really different. There was a dome in the center with the top painted to look like the sky. There was also a TV right where that door should be. I brought a PC game called oblivion that I got one day and just never played.*
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I was playing clannad, and I kept straying from Kotomi's path, choosing options for other characters.