19.99 is the third extended play (EP) by South Korean boy band BoyNextDoor, released on September 9, 2024, through KOZ Entertainment, five months following the preceding EP How? (2024). With members Jaehyun, Taesan, and Woonhak credited for writing the EP's tracks, 19.99 explores the anxieties of the youth before they turn twenty. The EP was supported by two singles: "Dangerous" and "Nice Guy".
BoyNextDoor defined their first three releases—Who! (2023), Why.. (2023), and How? (2024)—as part of the First Love trilogy, which explored a narrative of "first love and heartbreak".[1][2] With the trilogy's culmination with How?, member Taesan remarked that the group would continue exploring "very relatable" topics on their next release.[1][2] On July 24, 2024, The Chosun Ilbo reported that the group was finalizing its forthcoming release, with a release set for September.[3]
19.99 was released on September 9, 2024, as BoyNextDoor's third extended play (EP), with "Nice Guy" marketed as the EP's title track.[5] The album's release was preceded by the pre-release single "Dangerous" on September 2.[6]
KOZ Entertainment announced the EP's title on August 12 through a teaser trailer titled "The Beginning of Countdown: 19.99".[5][7] The 16-second teaser trailer features a push-button telephone lying on a puddle, rapidly counting down before being picked up by the members who then walk away.[8] Two skits related to the album's theme were released in the lead-up to the EP's release: "Starting Your 20s" on August 16 and "How to Flirt" on September 6.[9][10]
^Jeong, Bit (2024-07-24). "[단독]보이넥스트도어, 9월 컴백…'5세대 실력파'의 귀환" [[Exclusive] Boynextdoor, September Comeback… The Return of the ‘5th Generation Talent’]. Sports Chosun (in Korean). Archived from the original on 2024-07-24. Retrieved 2024-07-24.
^Mi-kyung, Seon (2024-08-15). "보이넥스트도어, 9월 2일 컴백 선공개 곡 발표한다" [BoyNextDoor to release pre-released song for comeback on September 2nd]. Osen [ko]. Archived from the original on 2024-08-18. Retrieved 2024-08-18.
^Choi, Hee-jae (2024-08-15). "보이넥스트도어, 9월 2일 선공개곡 발표…컴백 열기 UP" [BoyNextDoor to release pre-released song on September 2nd… Comeback fever rising]. Edaily [ko] (in Korean). Archived from the original on 2024-08-15. Retrieved 2024-08-18.
^Jeong, Seo-hyeon (2024-08-13). "보넥도, 미니 3집 '19.99' 발매…컴백 예고 영상 공개" [Bonekdo, 3rd mini album '19.99' released... Comeback preview video released]. Newsis (in Korean). Archived from the original on 2024-08-13. Retrieved 2024-08-13.
^Hyun, Jeong-min (2024-08-15). "보이넥스트도어, 9월 2일 선공개 곡 발표…컴백 열기 더 뜨겁게 달군다" [BoyNextDoor to release pre-released song on September 2nd… Heating up the comeback fever even more]. SportsWorldI (in Korean). Archived from the original on 2024-08-15. Retrieved 2024-08-18.
^Seon, Mi-kyung (2024-08-17). ""스무 살, 제법 다채로워"..보이넥스트도어, 유쾌한 콩트로 컴백 예열" ["Twenty years old, quite colorful".. BoyNextDoor, warming up a comeback with a cheerful skit]. Osen [ko] (in Korean). Archived from the original on 2024-08-18. Retrieved 2024-08-18.
^Seon, Mi-kyung (October 24, 2025). 보이넥스트도어, '19.99'로 데뷔 첫 밀리언셀러 달성[공식] [BoyNextDoor, '19.99' Achieves First Million-Seller Debut [Official]] (in Korean). Osen [ko]. Retrieved October 25, 2024 – via Naver.