This is R-18 rated hentai side story by the author of Shuukatsu Shippai shita Succubus-san wo Hiroimashita, intended to show the first sex experience of main characters of his main manga.

Yuuki took in Nono, a succubus who failed at job hunting, and decided to let her stay at his house. 
Nono is not good at sex even though she is a succubus. But that is why the two have a pure relationship. 
A chaste pure-love comic that will make you smile!
 
(Source: Kadokawa, translated)
 
Note: Originally self-published on Twitter, the series was collected for commercial publication with first volume released on 2021-02-27.

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