Succubus Yondara Haha ga Kita!?

Based on the CG collection by Chinjao Girl. (チンジャオ娘。). Takashi tries out a succubus summoning circle he found online, and it works! The only problem is that the one he summoned ended up being his mom... "There's no way my mom is this much of a slut!" he thought. But oh, how wrong he was... ...