Honestly speaking, I'm quite shocked by this manga's score. What's so good about it? Even as a person with no real standards, I truly believe this was nothing more than something steamy you can read when you're in your horny hours. Small premise apart, let me explain properly. This review covers not only this manga but his prequel "Otokogokoro" as well. The story was mediocre from the start until the very end, the way the characters just fell in love was nothing special and not realistic at all. The premise was just so plain and useless details were not brought up or analyzed in anyway after that.It would have been interesting if some problems about their age gap or their relationship as a whole showed up, but nothing. They literally gave us nothing.
I also wanted to add that yes, I get it that everyone (me included) loves clichés - they wouldn't be used if no one did - but if they just fall flat without any development the result is shabby and pretty boring. I feel like the only reason worthy reading this manga is the presence of pretty good sex scenes because other than that, what is left is just... meh.

The art was quite good, the only thing I truly enjoyed. Nothing much to complain about, the style isn't really my type but I acknowledge the fact that it's still pretty good. The characters all had different designs and you don't feel like they're one the copy of the other.

The main characters were both pretty flat. Again, no character development, they just fell in love at the beginning and their feelings didn't change at all throughout the story. About the secondary characters, they had no role AT ALL. And since there's no character development for the protagonists nor something important to remember about the supporting cast, there's nothing much to say for this section either.

All in all, this manga deserves nothing more than 5. It could have been much better if the author decided to analyze even only one aspect of their relationship or the characters themselves.

Sorry for my English!