in the first couple i don't think it's fair that black hair became the devil while brown hair became an angel, the higher rank devil said that's because he made a lot of girls cry but that literally wasn't his fault? brown hair introduced all of his girlfriends to him because he loved him and wanted his girlfriends to see his true love and not only is it very cruel, he became an angel because all of the women he dated found their fated partner after breaking up with him but he had nothing to do with that.
the story is actually not that bad and the other couple are cute (it's one of those story where everyone is gay lol, it always makes me laugh) it also doesn't have much relevance to the story but there's nothing much to say about this manga the stories are cute
Tenshi no Sasayaki wa Akuma wo Otosu