Aniplex announced that Shinichi Fukuda 's manga Sono Bisque Doll wa Koi wo Suru has 5.5 million copies in circulation.
The book has over 2 million copies in circulation compared to the beginning of the year, before the anime premiered on January 8th of this year.
The manga Sono Bisque Doll wa Koi wo Suru therefore had 5 million copies in circulation last month alone.
It's always important to remember that the numbers above are not sales statistics. The manga has released over 2 million copies since the anime premiered, but that doesn't mean all 2 million copies have been sold.
Source: ANN