Noh Go-jin (Kim Jae-wook), the CEO of GOTOP — South Korea's top math institute — pretends to have amnesia after injuring himself in a car accident. Lee Shin-ah (Krystal Jung), Go-jin's introverted and quiet secretary, is suffering from multi diagnosis. Believing that Go-jin has amnesia, Shin-ah pretends to be his fiancé.
Lee Ji-min as Michelle Lee,[9] a unique English teacher who was scouted by Noh Go-jin for a penalty.
Lee Si-eon as Kang Min,[7] a former English teacher who was kicked out by Noh Go-jin.
Jo In as Kim Hye-sun,[10] Noh Go-jin's former secretary, and a current salesman of a study book.
Moon Do-yoon as Lee So-ra,[11] Noh Go-jin's former secretary who resigned after three months due to Noh Go-jin's strict temperament beyond meticulousness.
Park Han-sol as Choo Ok-hee,[13] Lee Shin-ah's close friend who lives with her. Ok-hee has a career as a stage actor. She is a true friend that Shin-ah can rely on. During the day, she works part-time as a secretary at a lawyer's office and goes to auditions all the time.
Yoon San-ha as Lee Su-ho,[14] Lee Shin-ah's brother and Chu Ok-hee's boyfriend.
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^Shim, Eon-kyung (August 25, 2021). [단독]유인영·하준, '크레이지 러브' 주연 합류...신선한 케미 기대 [[Exclusive] Yoo In-young and Ha-joon will join the lead roles of 'Crazy Love'... Looking forward to fresh chemistry]. SpoTV News (in Korean). SpoTV. Archived from the original on January 26, 2022. Retrieved January 26, 2022 – via Naver.
^ Jump up to: abcdefgLee, Kyung-ho (February 11, 2022). '크레이지러브' 김재욱X정수정, 달콤살벌 재미 예고..3월 7일 첫방 ['Crazy Love' Kim Jae-wook × Krystal Jung, a preview of sweet and bloody fun... First airing on March 7]. MT Star News (in Korean). Archived from the original on March 9, 2022. Retrieved February 11, 2022 – via Naver.
^Kim, Woo-seok (March 2, 2022). '크레이지러브' 백주희 출연 확정 [Baek Joo-hee confirmed to appear in 'Crazy Love']. Sports Kyunghyang (in Korean). Archived from the original on March 2, 2022. Retrieved March 2, 2022 – via Naver.
^Kim, Hye-jeong (February 15, 2022). 배우 이지민 '크레이지 러브' 캐스팅[공식] [Actor Lee Ji-min's 'Crazy Love' Casting [Official]]. Sports Kyunghyang (in Korean). Archived from the original on February 15, 2022. Retrieved February 15, 2022 – via Naver.
^Ahn, Byung-gil (February 14, 2022). 조인 '크레이지 러브' 출연 확정[공식] [Jo In confirmed to appear in 'Crazy Love' [Official]]. Sports Kyunghyang (in Korean). Archived from the original on March 9, 2022. Retrieved February 14, 2022 – via Naver.
^Yoo, Byung-cheol (March 4, 2022). 신예 문서윤, KBS2 '크레이지 러브' 캐스팅 [Rookie Moon Do-yoon, cast in KBS2's 'Crazy Love']. Korea Economy TV (in Korean). Archived from the original on March 4, 2022. Retrieved March 4, 2022 – via Naver.
^Kim, Ji-hye (March 23, 2022). 크레이지 러브' 임원희X정성호X박한솔, 빛나는 열연..박장대소 코믹 열전 [Brilliant performances by Im Won-hee, Jung Sung-ho, and Park Han-sol in 'Crazy Love'... Big fight comedy]. Herald Pop (in Korean). Herald Corporation. Archived from the original on March 23, 2022. Retrieved March 23, 2022 – via Naver.
^Park, Jae-hwan (March 6, 2022). 박한솔, '크레이지 러브'에서 정수정 룸메이트로 출연 [Park Han-sol to appear as Krystal Jung's roommate in 'Crazy Love]. KBS Media (in Korean). Korean Broadcasting System. Archived from the original on March 7, 2022. Retrieved March 6, 2022 – via Naver.
^Park, Jae-hwan (February 14, 2022). 아스트로 윤산하, 드라마 '크레이지 러브' 캐스팅 [Astro member Yoon San-Ha casts in drama 'Crazy Love]. KBS Media (in Korean). Korean Broadcasting System. Archived from the original on February 14, 2022. Retrieved February 14, 2022 – via Naver.
^Lee, Jun-hyun (February 7, 2022). 유인영, '크레이지 러브' 특별 출연...김재욱의 첫사랑 役 [Yoo In-young will make a special appearance in 'Crazy Love' as Kim Jae-wook's First Love...]. Ten Asia (in Korean). Archived from the original on February 7, 2022. Retrieved February 7, 2022 – via Naver.
^Park, Soo-in (February 23, 2022). 고규필 '크레이지 러브' 출연, 김재욱 정수정과 호흡 [Ko Kyu-pil appeared in 'Crazy Love' where Kim Jae-wook and Krystal Jung worked together]. Newsen (in Korean). Archived from the original on February 23, 2022. Retrieved February 23, 2022 – via Naver.
^Kim, Won-gyeom (February 28, 2022). 서지후, KBS 새 월화극 '크레이지러브' 출연...'슈트비율+훈훈美' 넘치는 비서 [Seo Ji-hoo to appear in KBS' new Monday-Tuesday drama 'Crazy Love'...A secretary full of 'suit ratio + warm beauty]. SpoTV News (in Korean). SpoTV. Archived from the original on February 28, 2022. Retrieved February 28, 2022 – via Naver.
^Bae, Hyo-joo (March 15, 2022). '크레이지 러브' 태인호 특별출연 "비밀 열쇠 쥔 인물로"[오늘TV] [Tae In-ho's special appearance in 'Crazy Love' "As the person who holds the secret key" [Today TV]]. Newsen (in Korean). Archived from the original on April 12, 2022. Retrieved April 12, 2022 – via Naver.
^Ahn, Byung-gil (March 22, 2022). 윤사봉 '크레이지 러브' 깜짝출연, 정수정 머리채 잡았다 [Yoon Sa-bong makes a surprise appearance in 'Crazy Love', grabbing Krystal Jung's hair]. Sports Kyunghyang (in Korean). Archived from the original on March 22, 2022. Retrieved March 22, 2022 – via Naver.
^Shin, So-won (April 26, 2022). 하준, 동생 죽인 범인 김재욱 아닌 서지후임 알았다..."너희 대체 뭐냐?"('크레이지 러브') [Ha-joon found out that it was Seo Ji-hoo who killed his younger brother, not Kim Jae-wook... "Who are you?" ('Crazy Love')]. Ten Asia (in Korean). Archived from the original on April 26, 2022. Retrieved April 26, 2022 – via Naver.
^크레이지 러브 OST Part.1 [Crazy Love OST Part.1] (in Korean). Vlending. March 7, 2022. Archived from the original on March 7, 2022. Retrieved March 7, 2022 – via Melon.
^크레이지 러브 OST Part.2 [Crazy Love OST Part.2] (in Korean). Vlending. March 15, 2022. Archived from the original on March 15, 2022. Retrieved March 15, 2022 – via Melon.
^크레이지 러브 OST Part.3 [Crazy Love OST Part.3] (in Korean). Vlending. March 21, 2022. Archived from the original on March 23, 2022. Retrieved March 21, 2022 – via Melon.
^크레이지 러브 OST Part.4 [Crazy Love OST Part.4] (in Korean). Vlending. March 29, 2022. Archived from the original on March 29, 2022. Retrieved March 29, 2022 – via Melon.
^크레이지 러브 OST Part.5 [Crazy Love OST Part.5] (in Korean). Vlending. April 4, 2022. Archived from the original on April 4, 2022. Retrieved April 5, 2022 – via Melon.
^크레이지 러브 OST Part.6 [Crazy Love OST Part.6] (in Korean). Vlending. April 12, 2022. Retrieved April 12, 2022 – via Melon.