Lover's Vain

Kkeuteseobuteo Hangeoreum / One Step From The End / В одном шаге от конца / 从尽头的一步 / 在结束前开始 / 끝에서부터 한걸음 Bae Songwoo is in a one-sided love with his longtime friend, Kim Sangjin. Living his life hiding his feelings, one day Bae Songwoo finds a suspicious book in his house, and written inside is Kim Sangjin's life story.
But Bae Songwoo is just a passing extra...?!
As he tries to ignore the book, Bae Songwoo soon realises that everything is going as written...