
I like the plot, and the characters.
On the other hand, I feel a bit offended that because the boy refused to make a single contact with the opposite gender, he automatically knows nothing about sexual things.
(Technically the manga is treating women as the origin of sexual desires or sexual objects)
I may be exaggerating it, but I would have liked something more believable for his absolute purity.
(Not to mention, I'm not a fan of the yaois who are gay because of the lack of girls)

I think the chapter implied that the reason for his purity wasn't just his lack of female experience. His dad isn't around, so he couldn't ask him questions, and he didn't hang out with other boys. Moreover, he even said that he skipped health class, so he doesn't even know the basics of sexual puberty.
Something that makes clear this story, is how they treat you according to the gender you have, and how unfair that is.
Until now the only one who respects Rei for who he is, is Arsenio (Although he can't help himself feel attracted to Rei).
Rei should learn to get more respect for himself and his body.
And I don't like Lloyd's logic, that's sexist and closed-minded ヽ(`Д´)ノ, if you really want to help Rei, you should help him to be a boy again, not treat him like a pet or damsel in distress.
I read enough gender bender to know that Rei would probably stay like a girl because she will fell in love with Arsenio ╮( ̄▽ ̄)╭, but at least Arsenio respects Rei, and I appreciate that.ヾ(❀╹◡╹)ノ~