First of all, let me say that the guy is NOT a pedophile...
- He is attracted to the girl's cuteness, not her young age. At some point he imagines her as she is in the future (with her dream of being a school teacher fulfilled) and is still just as attracted to her future self (if not more). And at first he actually thought that she is a bit older than her age.
- He is not interested in any other young girl besides the female protagonist. He visits her school and doesn't ogle anyone. He is not "into kids".
- He doesn't think of having sex with her, molesting her. He respects her, her age and innocence. Actually, he usually is afraid to touch her at all. Pedophiles, on the other hand, have strong sexual urges towards children; strong enough they often can't control themselves, even knowing the terrible consequences of getting caught.
- The guy totally likes big boobs, lol. He is attracted to the prez too.
Okay, his attraction for the girl may still bother you, but saying that the guy is a creep who should be in jail is ridiculous.
Anyway, I really like this manga because it's very unique (can't think of any other story like this), fresh, funny. And I adore the male protagonist, he is such a nice guy. Kind and just adorable. I personally prefer him with the boss-- not because his affection for the young girl bothers me, but because I am not fond of her as a character. She is cute but not much besides, while the boss is such a cool strong woman XD I really like her character, also her behavior when she realizes that Kurose is dating a middle school girl. I think the adults in this manga are super decent and the story addresses some stereotypes/false accusations/idiocy, like that "people who enjoy loli games/manga are pervs, as are those who make them". Here we have people who make hentai games (and some of their characters represent young girls), and wow, they not only don't rape anyone, they don't even want to rape anyone XD As a yaoi fangirl who likes some shouta manga but have no interest in kids in rl (actually, I dislike them and prefer they stay as far away as possible, lol), I really appreciate this aspect of the story. I hope more people would able to separate fiction (that often have little to do with how things really look in rl ie. super cute innocent moe shota boys vs. rl brats haha) from reality, and not judge others by their own standards.
And just for the record, since many people make this mistake... While the age of consent in Japan is 13, in reality it's 18 in most parts of Japan (because they have jurisdiction to set their own laws on this), so no, it's not legal for the pair from Miman Renai to be together, in sexual sense. But, the cool thing is, the guy doesn't seem to plan on using the girl like this, just being with her is enough for him. If he is willing to wait with any sexual activity until she is older, I don't see their relationship as creepy at all, be it in Japan or anywhere.