[Entertainment] Publisher adds Japanese porn star on 3,000 math book covers.

[The Lovin Spoon]

How can you tell what the perky teacher in that photo is really teaching her students?

It turns out a Thai publisher accidentally put a Japanese porn star on the cover of a math textbook.

As Rocket News 24 reports, the MuangThai Book Center had distributed over 3,000 copies of its latest math textbook before realizing its mistake.

The cover originally featured a bright young schoolteacher on a cute and colorful cover.

The problem? The teacher on the cover isn't from a generic stock photograph. That's Japanese porn star Mana Aoki, who is known for photoshoots like "Class Flirt," "Oil Nudes," and videos like Costume Play Working Girl. It's a marketing shoot for the latter that provided the textbook photo:

[Eternal_Jamie]

So that's why they "study" harder than us..

[emm10]

Be my teacher pls?

[The Lovin Spoon]

So that's why they "study" harder than us..

hehe harder hehe

[TheGoldenKibby]

Lucky Japanese kids. Now they don't need a phone to have fun in school.