Kowaremono The Animation
Genres: Hentai
Type: OVA, Episodes: 1
Aired: Dec 4, 2015
Studio: Studio 1st
Source: Manga
Rating: Rx - Hentai
Synopsis:
Based on the manga by Yoshiron. 

A man's wife left him for another man, leaving him and her own daughter, Nanakura Kasumi, behind. Frustrated, one night he comes to his stepdaughter... 

(Source: AniDB)