Very different story but I was remained of Seobok while watching Alienoid. Both movies are sci-fi, has non-human main character, special powers, action and in both are parent/child relationship but they're not actually related by blood (in Alienoid it's Father/daughter relationship, in Seobok it's not entirely family-like relationship but I got fatherly vibes from their interactions)
Both are scifi with a stunning star studded cat not to mention kim taeri, super colorful, good action and effects. I do recommend waiting for alienoid 2 to come out and binge for the full experience wish i did that but still good though a bit messy at times with too many plotlines. But still had fun