Fans were blindsided to learn that Daichi Sorayomi's
Keijo!!!!!!!! manga will be wrapping up in the next doulbe issue of Japan's Shonen Sunday magazine. It's likely that the reason behind the decision was due to the poor sales of the Winter 2016 anime's DVD.
Unconfirmed reports on reddit stated that Sorayomi posted on his blog that the anime sales of the DVD were so poor, they began affecting sales of the manga. Hopefully, Sorayomi wasn't totally blindsided by Shonen Sunday's decision and has time to wrap up his ecchi sports manga.
The report from Japan was that the series always had a ton of buzz due to its "subject matter" but it could never transfer buzz in the otaku communitty to actual sales.