2x11 - My Girlfriend is an Alien

Fang Leng kissed Xiao Qi, but she immediately pushed him away. He claimed it was a return for her kiss earlier, and playfully asked her to replicate the perfume's scent they'd both encountered before. Xiao Qi tried but failed to reproduce the exact smell. However, when blindfolded, she recognized the scent on Fang Leng's body and concluded.