Conception is a Japanese RPG video game developed by Spike exclusively released for the Playstation Portable in Japan on April 26, 2012. The game is currently remastered for Playstation 4, while the second game was released for the PlayStation Vita and Nintendo 3DS across 2013 and 2014 in Japanese and English, and later released on Steam in 2016. The anime adaptation produced by Gonzo is scheduled to premiere on October 10, 2018.
On his high school graduation day, Itsuki's cousin, Mahiru, tells him that she's pregnant. Just then, a gate of light emerges and transports the two into the world of Granvania. In this land, "Impurities" have been causing a disturbance to the Stars, ultimately plunging Granvania into chaos and disorder. And Itsuki, now revealed to be one who is fated to meet with the "Star Maidens", is seen as Granvania's last hope and was thus given the task to produce "Star Children" and combat the "impurities". And unless the task is complete, Itsuki may never be able to return home.