It's pixiv Secretariat.

On pixiv for PC and pixiv for smartphones, you can now search and order illustrations and manga by "popularity among boys" and "popularity among girls".
This function is exclusively available to Premium users, like the "search by popularity" function.

You can order your search results by popularity by clicking on "sort by popularity" after the results are displayed. Then, select "popular with all", "popular (female)" or "popular (male)".



You might even encounter new works you like between those you've already browsed by using the "popular with all" search function!
Please use this new function to find even more works you like.

■ What's pixiv Premium?
It's a service that makes pixiv even more convenient by providing extra functions such as search by popularity, the mute function and the option to hide ads. You can pay for your subscription by credit card, carrier settlement, GooglePlay, iTunes and more.

Register for pixiv Premium here.

Thank you for your continuous patronage with pixiv.