“Bad Boy, Sad Girl” is an R&B track by Red Velvet’s Seulgi featuring rapper BE’O, included in her debut solo album 28 Reasons. The song captures the emotions of two lovers lying awake at night lost in thoughts of each other, depicting the conflict of a sad, conflicted girl hopelessly fallen for a “bad boy.”

Song Credits

  • Artist: SEULGI
  • Album: 28 Reasons
  • Released: October 4, 2022
  • Length: 2:57
  • Label: SM Entertainment
  • Lyricist: danke, BE’O
  • Composer: BE’O, Dino Medanhodzic, Johanna Jansson, RYAN JHUN

SEULGI “Bad Boy, Sad Girl” Official MV

SEULGI “Bad Boy, Sad Girl” Lyrics

Hangul

어저껜 꽤나 길게 전활 해놓고
눈을 피해 겨우 짧은 인사뿐인걸
늘 연결이 끊기는 wi-fi 같이 굴지
어딘가 꼬인 coding 속을 모르겠어 도저히

아마도 넌 not that into me
인정하긴 싫어 솔직히
한 걸음 다가가면 두 발쯤 물러나 넌
또 이런 식이야 sick of love
애매하게 구는 넌
Bad boy, bad boy, bad boy
괜히 센치해져 난
Sad girl, sad girl, sad girl
오늘 밤도 up alone

You think I’m a bad villain
아냐 look into my eyes
(Honey) eyes (뚝뚝) I’m
너의 혈액형, 나이 그리고 키
니가 자주 보고 웃는 meme
오이를 싫어하는 것과
Beyonce를 좋아하는 것까지
이거 봐, 다 알어, 한 번만 봐줘
어디가, 어디가, 어디가 진짜?
아마 난 다른 애들과 다르고 싶어 이러는 걸지도 몰라
알아줘 조금만, 그러니 가지 마
I’m not a bad boy, don’t be sad, girl

사실 말이야 I’m so into you (can’t believe)
단지 모르겠어 how to deal (baby, it’s so easy)
무심한 듯 chic한 척
사실 다 concept인걸
난 보기보다 서툴러
오해인 걸 I’m not a
Bad boy, bad boy, bad boy
울리긴 싫어 like a
Sad girl, sad girl, sad girl
오늘 밤도 up alone
잠이 안 와 up alone

아리송해 정말 (yeah-yeah-yeah)
왜 이럴까 진짜? (Yeah-yeah-yeah)
모르겠어 answer 너를 푸는 방법
어긋나는 signal
자꾸 애매하게 굴지 마
Bad boy, bad boy, bad boy
괜히 센치해져 난
Sad girl, sad girl, sad girl
너도 나와 같을까?

오늘 밤도 up alone
너는 어떨까?
잠이 안 와 up alone

Romanized

Eojeokken kkwaena gilge jeonhwal haenoko
Nuneul pihae gyeou jjalbeun insappuningeol
Neul yeongyeori kkeunkineun Wi-Fi gachi gulji
Eodinga kkoin Coding
Sogeul moreugesseo dojeohi

Amado neon Not that into me
Injeonghagin sileo soljiki
Han georeum dagagamyeon
Du baljjeum mulleona neon
Tto ireon sigiya Sick of love

Aemaehage guneun neon
Bad boy bad boy bad boy
Gwaenhi senchihaejyeo nan
Sad girl sad girl sad girl
Oneul bamdo Up alone

You think I’m a bad villain
Anya Look into my eyes
(Honey) eyes (ttukttuk) I’m…

Neoui hyeoraekyeong nai geurigo ki
Nega jaju bogo unneun Meme
Oireul sileohaneun geotgwa
Beyoncereul joahaneun geotkkaji

Igeo bwa da areo han beonman bwajwo
Eodiga eodiga eodiga jinjja
Ama nan dareun aedeulgwa dareugo sipeo
Ireoneun geoljido molla

Arajwo jogeumman geureoni gaji ma
I’m not a bad boy, don’t be sad, girl

Sasil mariya
I’m so into you (Can’t believe)
Danji moreugesseo
How to deal (Baby it’s so easy)
Musimhan deut Chichan cheok
Sasil da Conceptingeol
Nan bogiboda seotulleo

Ohaein geol
I’m not a bad boy bad boy bad boy
Ulligin sileo
Like a sad girl sad girl sad girl
Oneul bamdo Up alone
Jami an wa Up alone

Arisonghae jeongmal
Wae ireolkka jinjja
Moreugesseo Answer
Neoreul puneun bangbeop
Eogeunnaneun Signal

Aemaehage gulji ma
Bad boy bad boy bad boy
(Jakku aemaehage gulji ma Bad boy)
Gwaenhi senchihaejyeo nan
Sad girl sad girl sad girl
Neodo nawa gateulkka
(Look at me, feel like me
Look at me yeah yeah)
Oneul bamdo Up alone
(Neoneun eotteolkka)
Jami an wa Up alone

Translation

We talked on the phone for quite a while yesterday Yet you avoid my eyes and barely give a brief greeting Always acting like a dropped Wi-Fi signal Some kind of twisted coding I can’t figure out your mind at all

Maybe you’re not that into me Honestly, I hate to admit it When I take a step closer You step back about two Always like this, I’m sick of love

Acting so ambiguous, you’re a Bad boy, bad boy, bad boy I get unnecessarily sentimental Sad girl, sad girl, sad girl Up alone tonight as well

You think I’m a bad villain No, look into my eyes (Honey) eyes (dripping) I’m…

Your blood type, age, and height The memes you often look at and laugh at Disliking cucumbers And even liking Beyoncé

Look at this, I know it all, give me just one chance Where, where, where are you going, seriously Maybe I just wanted to be different from other guys That might be why I’m acting like this

Please understand me a little, so don’t go I’m not a bad boy, don’t be sad, girl

To tell you the truth I’m so into you (Can’t believe) I just don’t know How to deal (Baby it’s so easy) Pretending to be indifferent and chic It’s actually all a concept I’m clumsier than I look

It’s a misunderstanding I’m not a bad boy, bad boy, bad boy I don’t want to make you cry Like a sad girl, sad girl, sad girl Up alone tonight as well Can’t fall asleep, up alone

So confusing, really Why am I like this, seriously I don’t know the answer The way to solve you Crossing signals

Don’t act so ambiguous Bad boy, bad boy, bad boy (Stop acting so ambiguous, bad boy) I get unnecessarily sentimental Sad girl, sad girl, sad girl Are you feeling the same as me? (Look at me, feel like me Look at me yeah yeah) Up alone tonight as well (How about you?) Can’t fall asleep, up alone

SEULGI “Bad Boy, Sad Girl” Meaning

Seulgi’s “Bad Boy, Sad Girl” featuring BE’O is a smooth R&B duet that explores the emotional contradictions of a complicated romance. The song tells the story of two people who cannot stop thinking about each other, even though they recognize the relationship may be unhealthy or destined to cause heartache.

A central theme of the track is falling for the wrong person. From Seulgi’s perspective, the “sad girl” knows that the man she loves is a “bad boy” who brings confusion and emotional turmoil, yet she remains unable to let go of her feelings. Her vulnerability highlights the frustrating reality of being deeply attached to someone despite knowing they may not be good for her.

The song becomes even more compelling through its dual perspectives. While Seulgi expresses longing and emotional conflict, BE’O’s rap verse offers insight into the “bad boy’s” thoughts. Rather than portraying him as entirely indifferent, the lyrics reveal his own uncertainty and hidden emotions, suggesting that both individuals are struggling with the relationship in different ways.

Ultimately, “Bad Boy, Sad Girl” is a story about mutual longing and sleepless nights. Despite their differences and the challenges between them, both characters find themselves trapped in the same cycle of affection, regret, and obsession. Through its late-night R&B atmosphere and honest storytelling, the song captures the bittersweet feeling of loving someone you cannot easily forget.