This is a good manga, is entertaining and can have some good tips here and there. Another thing I liked was the art, especially the girls (but not the occasional weird faces, one of the mangaka signatures).
I don´t like how it ended. I´m cool with Aiya getting to met his ex-girlfriend, the undone regret, and he moving on... But finishing the manga with Aiya sending the gang in some moral/philosofical search after his last lecture and then closing with a pretty sunrise... really?
We don't get to see our main male character getting to even first base with his girlfriend. Sure, they will do that and more eventually, but we don't get to see that. Geez... I wanted to see Kanji get some action, even if that happens some days after Aiya parting.
The MC:
-gets to cup a feel with his previous crush (1 boob, because Poppy was in control when he groped Morishita), but Aiya was missing and Kanji missed the chance to go beyond (he even didn´t kiss the girl).
-get lots of eyecandy from various girls (thanks to Aiya and Poppy).
-get lots of fun has "friends" with Saki.
-went on a pretty good date with Saki, but not getting beyond holding hands, sharing each other feelings and a cheek kiss.
He experienced some good things, some bad things, but I wanted to see he progress with his girlfriend after all he went through.
On the other hand... I didn´t like Waseda dating Morishita, it feels unfair. I mean, team Kanji-Aiya-Poppy-"author-san" gave him all he needed to get to know the girl, find a common interest HE is good at, and chances to meet with her and know her better. But Waseda didn't have to go through any of the uncomfortable experiences the MC has to, neither had to do some mayor effort. And when the MC wanted to try be a dog, for comic purposes, he isn't allowed.
First Waseda stalks Morishita, then he gets to do all those things when he was a dog, the girl starts missing him as a party partner, they meet again and get in a good mood, so start dating and ... he gets all of her! And he continue to act like a dog (overreacting and wagging his tail in front of his girlfriend).
Why the hell that creep gets the gamer girl with the most sexy body of the whole manga? The Author made things too easy for him, while the MC, after all the hurdles/trials that he has to surpass don´t get to kiss any girl, yet. Even if Waseda/Morishita is for the sake of proving a theory and comedy/irony, is still really unfair. Geez...
But I'm happy for Aiya. He reunited with his ex-lover and did a good job with the MC.
This was a long spoiler, hu?.
Despite what I wrote above I suggest you give it a try, I think is worth it.