True Blue

Wicked NTR Hentai with useless male that will get you mad. 

Netorare confirmed. The boy believed to have everything, but ultimately left with nothing. Imagine seeing the girl you love and see what is to become, because of "pleasure" you have not given. 

Both of these titles feature a pre-established relationship getting torn apart when a random guy steals the main gal (netorare). Additionally, both are based on games by LiLiM Darkness and sport similarly designed heroines. 

The plot has both similar male characters that does not dare to fight/protect who they love and fight to the end. An both plots also have main female characters ended in the same fate (except that Hitou Meguri's plot which have a gang going on her.) 

Both titles are classed as NTR or Netorare(Cuckold) which is a sub-genre in hentai and delves into the betrayal from the main leads partner. So for those unprepared, be warned that each title will usually get a rise out of you(and not the good type from down there) as in most cases, its usually in the form of the girl having sex with someone else whilst her partner watches defenseless all due to his own insecurities. If this is your fetish then I can guarantee that both titles will aim to please. For more info on these type of hentai, visit The Netorare Club here in MAL. read more 

Both series tell stories of women who have weak will and gradually became sex slaves (due to influence of males who are aware of their weaknesses and they take advantage of them), betraying their feelings to beloved ones. Grope ~Yami no naka no Kotoritachi~ and True Blue have rather bad endings, especially for main male characters.