I understand him being jealous of Song Si Yi because of his insecurities and such, and therefore I can look the other way when he gets overbearing and possessive in moments when she interacts with him. However, their first kiss and the hotel scene raised such massive red flags for me that I couldn't give this series a good rating. You don't have to push her against a wall to kiss her. Just ask for her freaking consent, or ease into it so she can back off if she wants too. And if the reason she backs off is because she's shy, then deal with it.
And gosh, when it comes to the hotel scene, I'm honestly baffled that people think it's acceptable behaviour. You're in college, for God's sake! Have these kinds of conversations with your partner instead of cornering her into it. Discuss whether you're both ready for it, and whether she's alright with sharing a room. And once again, if she back off because she's shy, then deal with it because she's not ready. If you planning to stay with her, then you should be willing to wait for when she is ready, but if you don't have the patience, then break up and find someone else who is. She's not obligated to sleep with you just because you're in a relationship. Gosh, that whole scene had me cringing so bad, I can't even.
Consent is sexy, and him not asking for it isn't.