Takane and Hana

Both r jdramas and r so cute
Both r kinda contract relationship but eventually fall for each other

The girl in both stories is a high school student who went to a meeting instead of her older sister. When the switch is discovered by the male lead, he doesn't want to give up the relationship with the younger girl.

Both have the same dating style and story development.
Both male leads are working at a high ldvel of management position in their offices.
Plus both ML are good in showing two sides of their attitude

Both have. Very familiar feel. Rich older guy poor girl who is a student. They start off badly but gradually c9me to care for each other.