Review Detail of Vishe in My teenage high school romance comedy can't be this perverted!

It was a great read in the initial chapters, it closely depicted the characteristics of Hikkigaya and merged well with the DxD plot. It started going a bit downhill for me after the tragedy with Hikkigaya loosing some of his personality traits, although a bit disappointing i can accept it as a process of character development. but the thing that annoys me most is the whole fiasco with raynare becoming his slave and how much he puts up with her antics. It seems like a very crude attempt to further the plot by introducing an unnecessary annoying character. i hope she will have no significant appearance in the further plot or atleast improve her behaviour.