**Original Webtoon: ** [Ridibooks](https://ridibooks.com/books/1515019145), [Naver Series](https://series.naver.com/comic/detail.series?productNo=6375868), [Bomtoon](https://www.bomtoon.com/comic/ep_list/heartvoice), [Lezhin](https://www.lezhin.com/ko/comic/inner_voice), [MrBlue](https://www.mrblue.com/comic/C000049992), [BookCube](https://www.bookcube.com/toon/detail.asp?webtoon_num=210433), [Toptoon](https://toptoon.com/comic/ep_list/Voice_of_Mind), [Toomics](https://www.toomics.com/webtoon/episode/toon/5928), [MComics](https://www.mcomics.co.kr/webtoonComic/8373), [Mootoon](https://www.mootoon.co.kr/comic/moo_list.mg?tcode=nreg) Si-eun, who lost her hearing in an accident and was exhausted with emotions, cannot hear the sound, but can hear the sound of the other person's earnest heart. Si-eun, who entered Choi Si-hyuk's secretary at the request of his biological grandfather-like mj chairman, opened her heart little by little to Si-hyuk, Sihyuk is trying to use Sieun like that...

Many stars rise and set in front of the stage, but some don't even have a chance to shine. A youthful romance that depicts the gorgeous backstage, the mixed love of trainees who dream of becoming musicians, and the irresistible temptation and betrayal.

Kim Jun-Kyung, who entered a prestigious high school with great difficulty despite her poor family circumstances, starts working part-time at a cleaning company to continue attending school without asking for help from others, and meets a man named Isak at the first house he cleans. A big house and luxurious items… Kim Jun-Kyung feels deeply drawn to Isak, who lives the wealthy life he had dreamed of, but is lonely and isolated like himself, and Isak also begins to hover around Kim Jun-Kyung… (Source: Lezhin, translated)

**Original Webtoon:** [Naver Webtoon](https://comic.naver.com/webtoon/list.nhn?titleId=839104), [Naver Series](https://series.naver.com/comic/detail.series?productNo=12426831)

**Original Webtoon:** [Lezhin](https://www.lezhin.com/ko/comic/sumbi), [Bomtoon](https://www.bomtoon.com/comic/ep_list/sumbi)

**Original Webtoon:** [Lezhin](https://www.lezhin.com/ko/comic/undercover_prince), [Naver Series](https://series.naver.com/comic/detail.series?productNo=6052190)

[Original Webtoon](https://series.naver.com/comic/detail.series?productNo=8082988)

**Original Webtoon:** [Lezhin](https://www.lezhin.com/ko/comic/redhood), [Bomtoon](https://bomtoon.com/comic/ep_list/redhood_), [Ridibooks](https://ridibooks.com/books/4419001660), [Naver Series](https://series.naver.com/comic/detail.series?productNo=5900223)

**Original Webtoon:** [Lezhin (Expired)](https://www.lezhin.com/ko/comic/hentai_3), [Daum](https://webtoon.kakao.com/content/%EC%9D%BC%EC%83%9D%EC%97%90-%EB%B3%80%ED%83%9C%EB%A5%BC-%EC%84%B8-%EB%B2%88-%EB%A7%8C%EB%82%A0-%ED%99%95%EB%A5%A0/2109)

[Original Web Manga](https://www.comico.jp/comic/928)