Hmm, what 'problem' do u mean? Tsukune has many problems lol. I'm not really fond of giving spoilers so all I can say is that some minor problems are solved but the main ones are either met with "acceptance" from the involved characters or given a 'temporary' solution. I suppose the 2nd arc will deal with the major problems.

Oh his sister? You mean his elder cousin. Err whatever, she's the only sisterly figure I know related to him. Anyway my answer is... the ignorant will always remain ignorant. Can't recall now what exactly occurred but she remained clueless.

I can't say she remained completely clueless - after all throughout volume 10 she used that magical mirror-toting fairy to unveil each student's true form and create mayhem around the academy. If anything, she knows that the place Aono goes to is full of monsters - unless, of course, she got her memory wiped. Since I'm handicapped by the language barrier, I can't guarantee her complete ignorance - but the cat is out of the bag when it comes to the girls' nature: she saw Moka sprouting fangs and Kurumu developping wings and a pointed tail.

I'm not sure where this will go, as in the beginning we were plowing through the usual 'monster of the week' routine - a lulling boredom that didn't get broken until the entire ghoul and academy rebellion arc. Lastly the topic revolved around Tsukune hiding his new nature from his relatives but this is pretty much over despite a short-lived hoopla at Aono's house.

What would interest me more, though, would be seeing either Moka or Aono going against the Purebloods - so far they only fought against the inferiority complex-plagued hybrids (in the French edition they translated their name as 'Barbarians') but never against the pureblooded races, which consider themselves to be the real thing compared to the small, crossbred fry. There was a run-in with a vampire in vol.10 but I must say I was somewhat disappointed - Moka saved the day again, despite the fact that vampires were supposed to be uber-monsters. That dude didn't even put up a decent fight.

Other than that, I would also hope for more berserking ghoul-Aono (and I'm not referring to the self-conscious ghoul!powered-Aono, of course.

He isn't exactly a vampire - there are subtle differences in the contamination process and Tsukune will soon realize that certain things are wrong with him. For now (I mean, before we get to learn what he's turning into), he wasn't 'Turned', at least in the traditional sense - although he does display vampiric-like symptoms.

Vampire blood happens to have 'poisonous', corrupting effects, which worsen if they keeps donating it to a simple mortal. The side-effects are mild at first but increase in magnitude with time...until Tsukune will eventually reach a point of no return.

'Season 2' is NOT a sequel - let's get that straight as many people seem to be mistaken on this account.

The magazine where R+V was published (on a monthly basis), Monthly Jump Magazine, went out of business due to poor sale rates. Coincidentally (or not, since the authors might have been forewarned and planned in advance), the last MJ issue printed had Tsukune going back home, marking the end of his first school year at the Youkai Academy.

Then, after a one-shot in Shonen Jump to keep readers interested (the one-shot marks the end of v10, too), R+V switched to a brand new magazine meant to replace the defunct MJ, namely Jump Square SQ (SQ = Supreme Quality), which also publishes Shiki, Tista, Claymore, Dragonaut: the Resonance, Kure-nai, etc...

'Season 2' is only named thus because of the infortunate magazine switch. S2 simply picks up where S1 ended...and I doubt the manga volumes (the first ch. of S2 will be the start of v.11) will even retain the 'Season 2' label as the readers who only buy entire volumes rather than monthly chapters won't most likely not notice any change or hiatus. It's merely a minor promotional stint to draw people to JS SQ (the two first issues were a big commercial success, btw, since they had to be reprinted several times).

She acts all mighty and doesn't want him to touch her, thus also doesn't allow him to come to close to the other Moka. If that goes on those two will never have any serious relationship and we'll end up with harem stories again and againt (BORING).
I also wonder what'll happen to Tsukune, being a ghoul isn't easy.
Personaly I'd like to end him up with Rubi, but I highly doubt that'll ever happen

when Inner-Moka tried to kill Ghoul!Tsukune and Kurumu blamed normal!Moka for his health condition, as well as the time when Tsukune learnt that Moka gave him vampiric blood to vanquish the hybrids. Aside from that I don't recall reading any 'I-hate-you-because-you're-dating-Tsukune' episodes. If there were any that eluded my memory, then I believe they're too mild to be considered serious. Heck, even the catfights that concluded 'season 1' were simply an excuse for comic relief and slapstick comedy rather than an incentive to shed tears and go emo like Athrun Zala on a bad hair day.

From what I read in other forums (though the raw has yet to be scanned, cleaned and shared), we get to see one of Moka's three sisters...who is a bit too fond of her sis.

exorcist which comes and helps him due to the eyes and smile.