Professora de Biscoito e Doce Estrela (2005)

Premise seems kind of similar...Cha Chi Soo and Tae In are a lot alike and the younger man-older woman love angle.

In both series the woman wants to be a teacher and she enters in conflict with a student.

They both have the same professor/teacher relationship theme.
Both of them have a little bit of drama and romance, of course.

Both dramas star Gong Yoo and focus on a student/teacher relationship

Both are stories about high school students falling in love with their teacher. Both are touching romances. The J drama is more serious and intense than the K drama.

both are female teachers who are bullied by their students but then grow a bond with them, in gokusen she is the heiress of a gang and is strong physically and helps her troubled students earning their respect, whilst in biscuit teacher she is weaker than the students make her out to be , gokusen hasn’t got any romance in like biscuit teacher but is just as enjoyable

Teacher and student relationship and the inevitable boundaries that lie ahead.
Not to mention the charming charisma of Gong Yoo. ;D

Both are about male student and female teacher falling in love.

They are both about a student-teacher romance. Majo no Jouken is far more serious and dark.

- similar vibe
- teacher - student relationship (though in MSH they are the same age)
- strong female lead

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.

both tackle school life and the love triangle between two teachers and a student. Though Biscuit Teacher and Star Candy narrates a more serious and mature tale.

Both drama has an older woman at the mercy of a high school student. The younger man ends up falling for the older woman after she helps him overcome his internal conflicts. However, the woman is pining his male relative who is her first love.

Following a failed confession to her first love, female high school student Mikoto Ochiai contemplates jumping off the roof of the school building. However, her thoughts are interrupted by the arrival of Jin Haiba, the physics teacher known for being a slacker and the butt of students' jokes. Calmly, he lights a cigarette and asks for an explanation of the events that led her to this precipice. Rather than dissuade her from killing herself, he makes a request—will she enter into a romance with him before she dies? Together, the two gradually ponder why they should keep living and why they should not love each other in earnest.

Both involve a noona romance where the FL is in a position of authority over the ML (ie boss or teacher) and knows a relationship with the ML is inappropriate. Find Yourself has a FL who has no experience with love. In Biscuit, the FL’s first love was her own teacher back in high school, who no works as a colleague in the school she’s teaches at. The central focus of these two is slightly different since FY centers on the aspects of learning to love through the relationship. Biscuit focuses on the love that grows from friendship/mentorship and takes a really long time for the FL to accept the ML.