In love unexpected actor and actress souls gets unfortunately connected ( linked) with each other . If actress gets in pain then so as actor also feels the pain . so actor protects actress in order to protect himself from pain . as times goes they fall in love with each other . and this is same as the day of becoming you because in this their souls gets switched ! making it interesting for the audience .
In both, the ML is a cold CEO whose past trauma has left him with an unusual medical condition. The FL is the key to curing his condition, so he keeps her close, only to fall for her. Both FLs saved the MLs after a car accident but neither ML can remember their face. There is a manipulative SFL determined to break the couple apart. While one drama is fantasy and the other is not, both have a similar feel and tone.