Tenshi-chan to Akuma-kun

is a Japanese manga series written and illustrated by Ishizaki Kenta. The manga was serialized in the Dengeki Maoh magazine and published in Japan by ASCII Media Works under the Dengeki Comics NEXT imprint from November 2013.

Synopsis
Have you ever heard of names that are read in an unusual way or have strange meanings? You know the ones that'd make feel like you could die of embarrassement if you were to be called by them? Those are known as uber fail names. This is the story of two people who carry such a burden.

(Source: Manga Updates)