Girigiri Out

is a Japanese manga series written and illustrated by Somato. The manga was serialized in the Dengeki Daioh Genesis magazine and published in Japan by ASCII Media Works under the Dengeki Comics NEXT imprint from January 2014.

Synopsis
The story of a charming girl cursed to need the bathroom whenever she's nervous, and a reclusive boy with a special power that helps her hold it in.

(Source: MangaHelpers)