Shuunanacho Tofu: A Short Big O Hentai

Here's a doujinshi from 1999 that I overlooked until now. It contains several stories, including one Big-O themed hentai with handsome, mysterious Roger Smith, the lovable android R. Dorothy Wayneright, and, strangely, what's-his-name from Excel Saga. I wish I knew what they were saying!

The doujinshi is over 60 pages long, but the Big O content is only nine pages.