We have the first trailer for the Overflow anime , adapted from the adult manga Overflow ~Iretara Ofureru Kyōdai no Kimochi~ by Kaiduka. Official Website
The series arrives on TV on January 5, 2020.
Therefore, the series will have two versions, titled "standard version" and an explicit "complete version." The "standard version" will be broadcast on television, and later the "complete version" for adults will be streamed on the ComicFesta .
Finally, Kaiduka 's Overflow ~Iretara Ofureru Kyōdai no Kimochi~ had a volume released by Suiseisha in October 2018.
Via: OtakuPT