The 2024 and 2025, fun, fluffy, HE Korean romcoms I've seen, enjoyed, and find to be well made and entertaining all have twelve episodes and so are pretty tonally consistent.
Wedding Impossible - Noona romance with a closet twist. Really good dialogue and acting in this. Feels fresh and current. It doesn't take itself too seriously to be fluffy, but it's more original than your garden variety romcom. Of these four, Wedding Impossible has the most dramatic range and is the least fluffy, but at the end of the day, it's a romcom.
Cinderella at 2 AM - Noona romance that turns some CEO and Candy tropes on their heads.
Love Scout - Charming, polished, suave office romance with 40-ish leads. Never puts a foot wrong.
Law and the City - Lawyers in their 30s finding themselves through career twists and turns. Yoon Kyun Sang's cameo is to die for. He's only in 3 eps, but his role is beautifully written, and he's adorable in it.