Yuri

Green Tea Bitch (n.): A woman who pretends to be pure and innocent but in fact is manipulative and calculating.
After school ends, a good honor student is threatened by the class's green tea bitch.
"I never thought you wide-eyed goody-two-shoes would do something like this."
"If you don't want me to expose your shameful secret..."
A cute romance that stems from a misunderstanding begins in That Time I Was Blackmailed By the Class's Green Tea Bitch!