HEARING the other said that she didn't like that he was being paired with him, Luo Yan felt the corner of his eye twitching. The reason why she's being antagonistic was definitely not because she didn't want Luo Yan to be paired with anyone. It's because he didn't want this 'him' to be paired with Luo Yan or probably with anyone else.
He didn't need to be a genius to know who this 'him' was. It's Shen Ji Yun. Which meant that this girl liked his cinnamon roll.
And he didn't like it.
It's not because he felt jealous, okay, maybe just a little bit, but because of the way she's showing this 'like'. Being mean and hostile to the person that happened to be close to the one she liked as if that person owed her or something was just the worst. It spoke of self-entitlement and ignorance. Especially more so since the other didn't even know Shen Ji Yun personally.