Hot as fuck. I never tire of hentai of Reika Kirishima, and the other girls are fine, too. I just wish I knew what game the other green-haired, leotard-clad chick and the purple-haired robot girl are from. I wasn't digging the futa stuff, though, and I'm curious to know why Hiromi Tengenji from Namco Bandai's Burning Force was the only character in this CG set that had some futa pics. Still, this was a lovely CG set. Leave it to Arikawa to make fantastic pornography out of obscure female video game characters from the 1980s and 1990s. Thanks for posting and sharing!
EDIT/ADD: I was able to ID the purple-haired robot girl. She is Mary from the video game Cosmic Soldier, a sci-fi, Japanese RPG developed by Kogado Studios and published by ASCII, and it was released in 1985 on the MSX, PC-8801, FM-77, and Sharp X1. Apparently, Arikawa-san had drawn her in the past in this CG set: