What that perfect shy girl is co-opted by the art club.
It's not just nude modeling. It's full blown everything!

That's what happened to me.
I walked into art club and there she was: plain, shy Rika.
Totally exposed in front of gawking boys, and the exhibition
was only the start of all kinds of humiliating shame.
Rika didn't agree to this... but she's too nice to walk out?

[From DLsite English]