Sebeonjjae Romance

Yeon-Woo, who has been living an ordinary life like flowing water, breaks up with her long-time lover Tae-Ju and meets her first love Se-Jin. But before she can feel the excitement she had forgotten, she suddenly returns to being a high school student…!? Since she knows that her shining first love and the end of a long-term relationship are both meaningless, she has no expectations for love!

(Source: Naver, translated)

Note: Chapter count includes two side story chapters.