If you're someone reads manga because you enjoy the stories of the protagonist and being led on by the emotions of the characters, atmosphere and settings and stuff then probably this review won't be helpful to you.
Before the review, some Q and A.
Does this manga use the above elements properly to tell the story?
sure I guess...
Does it make you feel stuff?
I guess....
Was it enjoyable?
FUCK.... NO... it was the equivalent of someone putting your brain into the dishwasher for 3 days and then raping it after.

The story was pretty standard... boy have crush on a nice girl, nice girl likes boy back, boy dumps nice girl for another girl that was FUCKEN BLACKMAILING HIM, blackmailing girl leaves too, boy hooks up with 3rd girl... which is fine for a story.... IF THIS WAS FUCKEN HENTAI AND HAS A NTR TAG UNDER IT.

Art is basically 1995-2005ish art style... where the period of art was transitioning between traditional (faces with lots of detail, people looked more realistic) and modern (bi-shounen / bi-shoujo). ie. small eyes, round faces, lines to show blushing instead of tint.

The characters are IMPOSSIBLE to synthesize with. the decisions they make are SO FUCKEN STUPID it makes NEAR's [DN] deductions sound like they make sense. The main character dumped a girl he had mutual love with for a girl that's been black mailing for like X days. And the only role of the Blackmail girl is to call everyone else stupid and be a douche bag.

Enjoyment - I'm representing the rating using 4 bits in 2's compliment so 9 = -7

Overall, this is not bad. (yes it was)