On the official site for the anime adaptation of the manga written and illustrated by Reiji Miyajima, Kanojo, Okarishimasu, it was confirmed that the series will have a total of twelve episodes spread over four compilation volumes.
The series has its premiere scheduled for July 10. For his part, Miyajima began publishing the manga in Kodansha's Weekly Shonen Magazine in July 2017. The publisher published the twelfth compilation volume on October 17.
Source: Official Site
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