Kimi ga Daredemo Aishiteru

The manga centers on Yuki, a temp worker whose mother passed away, and whose sick father only wishes to see Yuki in a wedding gown. Feeling trapped in her life, Yuki's only solace is Youji, her fiancé whom she met through a dating app, and whom she is looking forward to marrying. One day at work, Yuki meets a mysterious man named Shun, and through him, comes to know the other side of Youji's life.

(Source: ANN)