Season 1
01 Is it a person or a ghost?
58mThe one-of-a-kind prototype of Holo falls into Han So-yeon's solitary life, eager to help with anything she needs — if she will allow him.
2020-02-07 7.0
02 I'll help you by your side.
50mSeeing she has a crush on her co-worker, Holo offers to be So-yeon's dating coach. Ko Nan-do monitors their growing bond from his lab.
2020-02-07 8.0
03 What the hell is that woman?
56mNan-do moves in next door to So-yeon, convinced that being with her has broken Holo, and determined to do whatever it takes to fix him.
2020-02-07 7.5
04 He said he would be by my side.
54mConflicted about her feelings, So-yeon tries to distance herself from Holo. Baek Chan-sung sends his men after her glasses.
2020-02-07 8.0
05 I only see you.
54mWhen So-yeon wakes up in the hospital, something's changed about how she sees Holo. He and Ko Yoo-jin urge Nan-do to reveal himself to her.
2020-02-07 8.0
06 I want to be with Holo, and I want to hold hands.
56mSo-yeon realizes that loving Holo means certain relationship norms are out of their reach. Nan-do deals with unwanted attention from the police.
2020-02-07 7.5
07 You can't leave her alone in hacking, intrusion.
51mIn danger from those attempting to steal the prototype, So-yeon agrees to stay at the lab. Nan-do puts on his best impression of Holo.
2020-02-07 7.5
08 Can I take out the Holo trapped in the room?
50mNo synopsis yet.
2020-02-07 7.0
09 Can the three of us be good friends?
52mNo synopsis yet.
2020-02-07 9.0
10 There is nothing I can do.
53mNo synopsis yet.
2020-02-07 9.0
11 Wherever you go, Holo.
53mNo synopsis yet.
2020-02-07 8.0
12 So-yeon recalls the most fearful moment in her life.
54mNo synopsis yet.
2020-02-07 6.5
Who is in it
Yoon Hyun-minKo Nan-do / Holo
Ko Sung-heeHan So-yeon
Choi Yeo-jinKo Yoo-jin
CHANSUNGBaek Chan-sung
Lee Jung-eunSo-yeon's mother
Kang Seung-hyunYoo Ram
Son Jong-hakNam Gi-Ho
Jung Young-kiJo Jin-Seok
Jung Yeon-jooJi Na
Nam Myung-ryeolBaek Nam-Gyu
Jeong Do-wonMr. Jeong
Lee You-miJi Hye