Kim Min-seo (born April 9, 1996), known mononymously as Minseo, is a South Korean singer and actress.

She attended college with financial aid from a national scholarship but took a leave of absence for economic reasons.

[4] In the preliminaries, Minseo passed with positive reviews from judges Yoon Jong-shin, Baek Ji-young, and Ailee.

[5] In the first round, she sang Park Ji-yoon's "Fantasy" alongside Yoo Yu-min and Lee Ji-hee and was eliminated.

[7] Minseo sang IU's "The Story Only I Didn't Know" with Gil Min-ji, passing and advancing to the live broadcast finals.

[27] On February 14, 2018, Mystic Entertainment announced that Minseo's official debut had been postponed to early March due to the success of "Yes".

[28][29][30] On February 23, Minseo announced the name and release date of The Diary of Youth and the name of the title track, "Wonderful Dream".

[31] On February 26, Minseo announced that she would release four songs sequentially, starting with title track "Wonderful Dream".

[32] On February 28, Minseo revealed that composer Lee Min-soo and lyricist Kim Eana worked on the title track.