Both stories are older woman / younger man romances.
In Biscuit Teacher Star Candy it's a student / teacher relationship and in Ruk Sutrit it's a teachers assistant and a boy she tutors who fall in love. Also in both the male lead starts out as immature rich brat only to grow and change because of the female lead.
*Romantic comedies
*Both Couples always bicker
*Both are bitter-sweet and funny love-stories
*Female leads in both are strong and independent and intelligent
In both the main girl needs to tutor a spoilt rich guy and they can't stand each other.
Both series start with a conflict between a teacher and her student. In both series the student starts to have feelings for the teacher.
The Plot is similar because it has a teacher, who is very capable and kind but not idiot. The teacher goes teach the Main Leader's son, but he ends falling for her, this story is very interesting and cool. It shows that women are as capable as men and the kindness is very important in every way.