Since this manga received an anime adaptation, I decided to make a review for this one. I have read until chapter 36. (I won't put spoilers as much as possible)

The title "Kanojo mo Kanojo" basically means "She is also my Girlfriend"

Overall, this manga is full of comedy. So while reading this, please don't think if it's realistic or no. What makes this manga interesting are the characters, story and the jokes/comedy of it. I recommend this anime to people who likes comedy or rom-com mangas.

First, lets talk about the story. I rate it 8/10.
The story is unique for me, and the backstory/stories of the heroines were, plus it's pretty funny so I rate it 8 for now. it might change in the future chapters. Also, how the author uses the concept "Neo Updating Rom-Com" are really good.

Next, lets talk about the Characters. I rate it 10/10.
The main characters are stupid in different ways. They are also pretty unique. Plus the Heroines are really cute. Let me describe them. These characters makes the story more interesting and funny. So I rate it 10 as of now.

・MC/Naoya - He is honest and straightforward person. (in good and bad way) He is stupid, like he literally asked his girlfriend if he can do two timing.
・Saki Saki - Tsundere and hyper heroine. First GF of the MC. She is stupid like the girl in 'Aho Girl' the only thing that differentiate them are that Saki Saki can feel the embarassment. FYI "Saki Saki" is her real name.
・Minase Nagisa - Brave, Humble and Hard worker heroine. 2nd GF. She is brave because she confessed to the MC, even though he already have a GF. She is humble because she mostly doesn't care about herself. She is hard worker, since she literally work hard to achieve her goal. She is stupid in studies, even though she studies/work hard she still fail.
・Mirisa - Tsundere, Youtuber heroine. She is more Tsundere than Saki Saki. She is also stupid like the other main characters.
・Shino - Friend of Saki Saki. She disagree to the two timing. as of now she is just a supporting heroine, but lets see...

Art, I rate it 8/10.
Since the artstyle of the author seems fine, and it seems clean so I rate it 8/10.

Enjoyment, I rate it 10/10
I really enjoy it, since it makes me laugh always. It make sense, since the author of this is also the same author of "Aho Girl" which is a comedy manga/anime.

Thanks for reading until here. Once again I recommend this manga to people who likes comedy and rom-com animes/mangas. Don't read this if you hate harem-ish manga.

FYI I'm Team NAGISA!