Exclusive Fairytale- Leads had a brother/sister dynamic, but later fell for each other when they got older. In this case the ML fell first. They are also the same age.
Go Ahead +1
Put Your Head on My Shoulder- This is a college/youth drama. It overall gives similar vibes. Both the MLs are respectful, but can get jealous too.
You are Desire - This also a youth drama, and again, gives the same vibes, it's worth the watch.