A Bittersweet Life

 was a Slice of life Webtoon Original created by Donggeon Lee (Hangul: 이동건); it concluded on April 8, 2016. The original Korean Webtoon premiered on Naver and concluded on April 28, 2013.

Synopsis
''A collection of sweet stories about couples and singles, office workers and unemployed people. But be warned: there’s more than a touch of bitterness here.''

Related

 * Yumi's Cells: Same creator