The Flash of Lightning Before It Thunders
Unlike her friends, Kim Jojo has more pressing things on her mind than dating. Upon returning from abroad, Hwang Sun-oh goes to see Lee Hye-yeong.
Series
Love Alarm
좋아하면 울리는
“When you turn on the application, your heart will ring.”
2019EndedSouth Korea50 min
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What's it about?
Love Alarm is an app that tells you if someone within a 10-meter radius has a crush on you. It quickly becomes a social phenomenon. While everyone talks about it and uses it to test their love and popularity, Jojo is one of the few people who have yet to download the app. However, she soon faces a …
Where to stream?
Netflix
Checked 09/01/2026 · last check was a while ago · United States catalog · account required.
Available (check outdated)
Availability data partly provided by JustWatch via TMDB.
Trailers & videos
좋아하면 울리는 | 메인 예고편 | Netflix — Trailer · Korean · official · YouTube
좋아하면 울리는 S2 | 공식 예고편 | Netflix
좋아하면 울리는 | 티저 예고편 | Netflix
Love Alarm | Teaser | Netflix
Making a series to ring our hearts | Love Alarm Featurette [ENG SUB]
Cast of Love Alarm’s first script reading 📖🔍👀 [ENG SUB]
[Behind the Scenes]Kim So-hyun and Song Kang prepare for their first kiss scene |Love Alarm[ENG SUB]
[Behind the Scenes] Song Kang and Jung Ga-ram look after Kim So-hyun | Love Alarm [ENG SUB]
8 videos — they play on each provider's site
Cast
Kim So-hyun
김소현
Kim Jojo
14 episodes
Jung Ga-ram
정가람
Lee Hye-yeong
14 episodes
Song Kang
송강
Hwang Sun-oh
14 episodes
Go Min-si
고민시
Park Gul-mi
14 episodes
Lee Jae-eung
이재응
Chon Duk-gu
14 episodes
Park Ji-hoon
박지훈
Ji-Hoon
6 episodes
Kim Si-eun
Yuk-jo
14 episodes
Ki Do-hun
기도훈
Brian Chon
6 episodes
Bae Da-bin
배다빈
Mon-sun
6 episodes
Song Seon-mi
송선미
Jeong Mi-mi
14 episodes
Shin Seung-ho
신승호
Jang Il-sik
8 episodes
Shim Yi-young
심이영
Bae Gyeong-hee
14 episodes
Kim Young-pil
김영필
Hwang Jae-cheol
14 episodes
Park Seong-yeon
박성연
Jojo's Aunt
14 episodes
Yoon Na-moo
윤나무
Kim Min-jae
14 episodes
Ji Hye-ran
Z.Hera
Kim Jang-go
8 episodes
Song Geon-hee
송건희
Marx
8 episodes
Choi Joo-won
최주원
8 episodes
Kim Hee-chang
김희창
8 episodes
Kim Ye-ji
김예지
Sung Ji-yeon
8 episodes
20 of 24 people — scroll sideways
Crew
Writer
Cha Yeon-su, Kim Seo-hee, Seo Bo-ra, Lee Ah-yeon
Music
Taru, Hodge, Sung Yong Wook, Park Da Eun
Director
Lee Na-jeong, Kim Jin-woo
Episodes
2 seasons · 14 episodes in total
Season 1 — 8 episodes · from 08/22/2019
Page 1 of 1 · Episodes 1–8
There’s Nothing Anyone Can Do When You Like Someone
Sun-oh wants to know whether Hye-yeong has feelings for Jojo and tells him what he did. Jang Il-sik gets into a fight with Sun-oh and Hye-yeong.
The Miracle of Two People Liking Each Other
Jojo confronts Sun-oh about the photos. As rumors spread at school, Jang-go gets mad at Jojo for lying. Il-sik confronts Jang-go about what she did.
The Best Feeling in the World Is Knowing There’s Someone on My Side
Sun-oh asks Jojo about the school trip and realizes there’s not much he can do for her. Il-sik tells Jang-go something she doesn’t want to hear.
The Gravity of Liking Someone
Jojo tells Sun-oh about her parents and makes a surprising suggestion. She later confronts Jang-go after overhearing something.
2 guest appearances
Han Ye-ri (Radio DJ), Lim Se-mi
Your Heart Is Safe Now
News of the tragedy hits the airwaves. Hye-yeong finds Jojo at the library and informs her that he plans to court her the old-fashioned way.
Something I’ve Been Holding Back and Can Only Say to You
Jojo tries to put a shield around herself and tells Hye-yeong she doesn’t need his help, but he offers to take her somewhere special.
One Is Bigger Than Any Other Number in the World
Jojo ponders what it means to like someone and realizes a shield may not be necessary. Sun-oh wants to know whether she still has feelings for him.
Image gallery
Posters (19)
Stills (40)
Images © their respective rights holders · Source: TMDB