I started reading this cause I love vampire and stuff... it was going pretty well... Mc was kind of a crazy battle-maniac at the initial chapters... I enjoyed reading it... the hype moments were good too. it was funny, I just kept reading... his first MiL getting added to his harem... it was still good... but when his second MiL, also got added, that turned me off-- still I kept reading. 

I used to wait for chapters... used to stay up all night reading, but later, it just lost its initial charm that got me into it in the first place- 'Vampires'  with all the dragon-vampire s*it... all the Females lusting over him 24/7 there was one character I quite liked 'Haruna' was it? she got personality at first... but, inevitably, she also turned into cardboard cutout same as others. 

Anyway, it just not worth continuing after he conquered hell 

I was extremely disappointed. 2 starts cause I liked it a lot at the start. 

Will not recommend. (I'm not good at writing reviews) 

Edit: it's been a long time since I dropped it, so I don't remember much of minute details... this review is based on what I remember.