https://www.doujinshi.org/book/1247477/COSMIC-CYCLER/
https://www.suruga-ya.jp/product/detail/ZHOA5205

I'm uploading two versions of this doujinhi (none scanned by me), as they seem to be different scans:

/g/1368698/2822333d6f/
/g/1368696/9faf52787e/

Replacing the incomplete one at /g/147553/a424a66338/

The story in pages 33 and up feature the Three Girls Gang (Sugar, Ginger and Pepper) that appear in something like 3 episodes of the Urusei Yatsura TV series. Some info about them at https://uruseiyatsura.fandom.com/wiki/Three_Girls_Gang, https://uruseiyatsura.fandom.com/wiki/Sugar, https://uruseiyatsura.fandom.com/wiki/Pepper and https://uruseiyatsura.fandom.com/wiki/Ginger.

The second story (pages 27-32) is a incest one, as it features Asuka Mizunokouji and her brother Tobimaro Mizunokouji. See https://uruseiyatsura.fandom.com/wiki/Mizunokouji_Asuka and https://uruseiyatsura.fandom.com/wiki/Mizunokouji_Tobimaro for info about them.

I just gotta say, thank you so much for the great influx of Urusei Yatsura doujins! Lum is (and will always be) my favorite character, and these really brightened my day.

Base +6, younglad +6