Started watching this drama after being introduced to Go Sung Hee in Gaus Electronics (go watch that if you're not already - so funny). She plays a really sweet character called Han Soyeon who suffers from face blindness. She crosses paths with an AI character called Holo, created by an aloof genius character called Go Nando.
It's a sweet story with tech that is probably from 20 years in the future but ignore that and enjoy it for being a nice filler drama - maybe while you're waiting for new episodes of Gaus Electronics :)