Both dramas are about a male student falling madly in love with a female teacher.
Romance is more on the taboo side about teacher x student relashionship while Biscuit Teacher and Star Candy is more about the romantic feeling of the young student.
Side stories also preventing them to be together :
- Romance : the woman's family is responsible for the boy's father suicide.
- BT&SC : the teacher is romantically involved with a co-worker, who happens to be the boy's uncle.