They both have a cool, pokerfaced, 'attractive' male lead. And a girl who is a bit naive. both have happy endings with a lot of love. the difference is that itzaura na kiss is about school life, whereas cruel romance is between two people that are living in a big city and are a bit older. Both are cute and have funny and sad scenes.

The whole 'Romance between artists from the same company' gave me You're beautiful vibes. It also has humor, love triangles, an arrogant male lead (at the beginning) and blooming love with hardships. It's an enjoyable and lighthearted drama that will definitely give you similar vibes. Also, an ending that won't leave you with a broken heart and tears.

*WARNING*
1. You're beautiful has a crossdressing female lead, so if you do no like that, it's not recommendable.
2. Many people dislike Park Shin Hye (I don't know why, Google it), so you might want to know that she plays the main character in that drama.

Give it a try!