Looks like Same plot!!
Fashion designing world
Both FL is a desinger and ML is CEO.
Both drama include FL and ML smart and talented. Both end up liking each other

Both are college drama.
cute and simple love story that you have been on the edge of your seat from start ...
Both OST title songs are so awesome that feels like listen to their songs more and more. Both FL have same personalities, they both love to play basketball so much that there is also a scene of playing basketball competition. First ML confess their feeling to FL.
All over good drama if you like first romance then you might also like Love of summer night.....

Both have awesome chemistry
In CYLS, FL is a fashion designer, while in FIY, FL is a wine specialist.
Both series have some similarities like...
The ML is sweet to the FL except for the first meeting. FL has to kiss ML to change their luck
Cute height difference
And also both thier OST songs are fabulous
You should definitely watch it??