The similarities between these two are that they are both :
- short
-Slightl confusing
- minimal dialogue between the characters
- the character's motives are interesting?

they are both
-short
-cute
-the friend group is extremely supportive
-coming of age
-the ending is good and happy
-and both had the potential of being better if they made it longer

I was not a big fan of Fahlanruk but if you liked it and want something similar but a tad better then you will like Ai Long Nhai. They both focus on falling for someone at first sight and their journey of pursuing them along with moments of friendship. They both have great friend groups.

They both have a good amount of action and even though it is subtle in Weak Hero Class, it also has a bit of suspense cause you are trying to figure out what one specific character is thinking or what they will do.