Hi, I am making this post for anyone who likes to know when a particular event takes, such as first kisses when the leads get together if there are any breakups, and anything else that pertains to the show. WARNING: This post WILL contain spoilers, so please do not view it if you want the surprise factor in your watching. Okay now here are some timestamps/spoilers for My Girlfriend is an Alien 2:

Ep 8. First Kiss
Ep 16. Fang Leng confesses that he like Xiao Qi
Ep 17. Fang Leng and Xiao Qi become a couple
Ep 18. Xiao Qi finds out that Shiyi is from her home planet
Ep 21. Feng Leng recovers his rain amnesia
Ep 22. Feng Leng finds out that Xiao Qi is an alien
Ep 26. Xiao Qi gets her memories back

I gave this show an 8.5/10

Feel free to add anything I missed!