One and Only Anime Details and Episodes Ten years ago, Yeon-Ju left Eun-Seong, the man she loved, to protect his budding career. Now a stylist and devoted single mom to her son, Han-Byeol, she's… Series info · Watch free · Trending anime · Airing schedule FormatMangaStatusHiatusSourceWeb novelCountryKorea Drama · Romance Full Color · Heterosexual · Time Skip · Long Strip · Acting · Primarily Adult Cast Nal Daleun Ai · Positively Yours Yeon-Ju Go · Eun-Seong Im · Hae-Yeong Jin (Supporting) · Han-Byeol Go (Supporting)