Both doujinshi are by Tsukimi Daifuku of the circle Shimekiri Sanpunmae.
The first one is Yoko Han, starring the heroine of Gurren Lagann, and the other is the re-release of a 2004 doujinshi, -Toou anata ga watashi no Master ka? (Fate/stay night), that it was looking for during literally years.
I was hooked with this circle as a result of a Tohsaka Rin dakimakura drawn by Tsukimi Daifuku. Besides Rin, there is also Saber and Rider dakimakura, but Rin is the best looking one.
Since I have all three dakimakura in Spain, I can't take photos, but here is the shitajiki that came with Rin dakimakura.
Lovely, isn't it?