So in the manga the girl is tutoring this boy who she makes a plan to turn him to the perfect guy that would.become her boyfriend but when she.left after her tutoring session she.forgot the paper and the boy saw it the next day she came back the boy dropped his sweet innocent act and kissed her while threatening to tell his.parents if she didn't follow his orders
There was also this part where the girl.quit and another tutor replaced her with the same intentions and she got jealous but at the end the boy and.her got together , BTW the girl is a university student while the boy I think is in middle school.

Could it be Neko to Watashi no Kinyoubi?

No

It's Gokujou Bitter Shounen

DONDAKEE!!

Thanks so much 😀