Shonen series are the bread winners in manga, as can be inferred from any best-selling manga series list for any given year.

"Attack on Titan," "One Piece" or "Naruto" will always be somewhere in the mix if it's the past few years.

Perhaps that is why it's commendable that ecchi monster girl manga series "Monster Musume" has reached 2.3 million print copies in Japan. The announcement was revealed on Saturday via the wraparound jacket of "Monster Musume" manga volume nine.

Some fans are reacting to the news with hope that this will lead to a "Monster Musume" season two.

"I wouldn't be surprised if they announce a second season after the OVA comes out," said BlackPoint in an ANN forum.

For those not familiar with the series, "Monster Musume" manga was originally launched in "Monthly Comic Ryu" magazine in 2012 by creator Okayado. The series, which has yielded one spinoff manga shorts series and a TV anime, is being released outside of Japan by Seven Seas Entertainment.

The North American manga publisher describes the story of "Monster Musume" as follows.

"What do world governments do when they learn that fantastical beings are not merely fiction, but flesh and blood-not to mention feather, hoof, and fang? Why, they create new regulations, of course, like the Interspecies Cultural Exchange Accord!"

It goes on:

"When twenty-something Kurusu Kimihito becomes an involuntary "volunteer" in the government homestay program for monster girls, his world is turned upside down. A lamia named Miia is sent to live with him, and it's Kimihito's job to make sure the sexy snake girl integrates into everyday life. While cold-blooded Miia is hot for Kimihito, the penalties for interspecies breeding are dire. Even worse, when a buxom centaur girl, and a scantily-clad harpy move into Kimihito's house, what's a full-blooded young man with raging hormones to do?"