Conception
Japanese title: CONCEPTION（コンセプション）
Type: TV
Source: Game
Episodes: 12
Status: Finished Airing
Aired: Oct 10, 2018 to Dec 26, 2018
Broadcast: Wednesdays at 01:30 (JST)
Duration: 23 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Gonzo
Producers: Sotsu
Licensors: Funimation
Genres: Action, Comedy, Fantasy, Romance
Themes: Harem, Isekai, Parody

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.

(Source: Wikipedia, edited)