Good manga, I just hate how naive she is about the birds and the bees. At 16 she is no longer a child incapable of engaging in intercourse. It is a personal decision of if you are mentally prepared for it or not, physically, she is 100% mature enough. Also, why do so many manga that actually deal with this topic make it out to be the most painful life experience. It can be for some people, but for most it's just a light sting followed by a bit of soreness quickly forgotten. Sorry just had to vent.
Hanayomesama wa 16-sai