Celtrance https://twitter.com/celtrance

Also known as Kogaku Kazuya

http://www.dlsite.com/ecchi-eng/circle/profile/=/maker_id/RG36850.html For official releases of Celtrance doujins, including english versions.

Konata-san Pinch!, I'm Back, Counter Attack of The Red Girl and Mamimamix have been removed at Celtrance's request. They can be purchased on Celtrance's DLSite.

Ao Sumire Lucky Star Doujin released Nov 5 '08 Blushing Konata x Kagami Lots of kissing Moderate amounts of sex NSFW Romance Yuri
Aogeki Murasaki Mamoru! Lucky Star Doujin released Mar 22 '09 Foiled rape attempt Konata x Kagami Lots of sex NSFW Yuri
Lily x Lily Lucky Star Doujin released Apr 25 '12 Blushing Futanari Konata x Kagami Lots of sex NSFW
Peach Violet Lucky Star Doujin released Mar 7 '15 Blushing Lots of kissing Masturbation Miyuki x Tsukasa Moderate amounts of sex NSFW Romance Sequel Yuri