Sachi is a young woman pursuing a career as a manga artist. She befriends Onodera Punpun and serves an important role in his life. She has realistic views on things and isn't afraid to speak out, but most people think she is just a rude person.

Meet Punpun Punyama. He’s an average kid in an average town. 
He wants to win a Nobel Prize and save the world. 
He wants the girl he has a crush on to like him back. 
He wants to find some porn. 
That’s what he wants, but what does he get…?
 
(Source: Viz Media)

Sachi Nanjou