This review is written after reading 142 chapters.
For me this manga went from a really good to downhill pretty fast.
Story(6/10): When I started out reading this manga it did give me decent setting of story(First time came to know about the concept of rental girlfriends). I really had high expectations from this manga and it did deliver it at first. However mc's jumping between girls is a huge turnoff for me.
Character(2/10): The major demerit for me for this manga is Kazuya. Like how conflicted in heart a person can be and change his attitude on a whim. It took him more than 100 chapters to grow a pair down there. I literally feel sorry for Kibe(his friend) when he give advice to him about his ex. I usually don't curse but Kazuya is such a D**k that don't appreciate the help he gets from others. I don't even understand how the characters in the manga keep up with such a main protagonist. The only character for me that show's decent character development is chizuru and how she works for making her dream come true. I also liked Sumi and Ruka but I believe that Kazuya is no good for them and not the other way around.
Art(7/10): Art style I would is pretty decent for the manga and the characters and background are well portrayed.
Overall(4/10): I did give this manga a chance and kept reading it but it really didn't strike a chord with me. However this is my personal opinion and I believe this manga is such that other people may find it to be really good. So I do recommend this manga to someone who is looking for a rom-com story even though though I personally didn't like the manga.