This webtoon version by Libalent inc and FANY studio is a remake based on the original manga by the author Ka (可), the original author’s art style is honestly much better and worth checking out! The first few chapters are available for free on pixiv.
https://www.pixiv.net/en/users/65298021/manga
Really hope someone will pick this up and translate it (/TДT)/
WTF THE ART IS SO MUXH BETTER ID RATHER READ THIS
The way I saw Kieta Hatsukoi and then it all clicked together for me, no wonder I love it so much. Highly recommend both this and Kieta Hatsukoi ლ(´ڡ`ლ)