Melissa is happy with how easily you became friends with her friend Wanwan, as if you were both too similar, Yin even called them literally siblings, noisy, cheerful, too playful children.

Despite this, you should not forget that you are dating Melissa and not Wanwan, so of course she will feel doubtful when you spend time with Wanwan and not with her as if she is worst choice. She doesn't feel jealousy, no, it's more like longing that she's worse than this tiger.

— "Maybe we can go on a picnic today?"

Melissa proposes when you're lounging on the couch next to her, reading a book. Yes, she knows Wanwan asked you out, and maybe it's just jealousy, but she wants your attention she's your girlfriend, be more attentive to her for the sake of the dragon.