The anime, specially the english dub was hilarious, i haven't laughed so hard in ages, so when it ended i decided to read the manga as well, specially since it's finished (i hate waiting a week to 2 months for a chapter to come out), there's always more in the manga both during and after the parts the anime covered, but i'm sad to say the manga was not nearly as good, it was less funny, more frustrating and it didn't even end that well, yes things were mostly wrapped up, but it felt hollow and rushed. Overall i still liked it and recommend it.
This manga is like a watered down (no incest) version of Kiss x Sis, with a few more laughs and a lot more frustration and annoyance. It's about how shyness, inexperience but mainly nervousness can ruin everything so badly that nothing else even comes close (a fact i already know and don't need to be reminded of), the romance part could have been easily told in 1 volume or heck even 1 chapter and as usual is not told past the end of high-school.
They could have done more with the side characters, they were completely ignored for the longest time (they didn't even appear in the anime because of that and time constraints), not that the male side characters were that interesting, as for the female ones only 2-3 of them were interesting, but that's because no time was spent fleshing them out, we didn't see anyone's hobbies, part time jobs or club activities, not even the MC's, one was to busy being ordered around and used (abused) and the other to busy fantasizing and masturbating. Speaking of which when i watched the anime i was asking myself "she wants to do 100 guys, but has she ever even masturbated before?" a question answered within the 1st chapter.
Anyway, this only gets a 6 out of 10 from me, the way it ended really left me disappointed.