Both of them have similar plot i.e. time travelling, high school romance and going back to save their beloved one from a tragedy.

LGBTQ+
Chinese wuxia
Actors are on both dramas.
Both depict lesbian romance.
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Similar plot ML is grown up with FL by freeloading at her house and later grown up with feelings toward her.

Both has CEO ML also hardworking FL, pretend relationship, marriage without love.........................

Marriage without love and for convenience, I love both dramas chemistry, both ML are nice and caring.

Marriage of convenience, secret crush, pretend relationship, beautiful romance.
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In both FL has hidden identity also amazing romance...............................................................................................

In both dramas FL have hidden identity....................................................................................................................

Somehow I feel both of them are similar in a way like competitiveness to a wonderful romance.........................................

Both drama's main theme are reincarnation and romance......................................................

In both ML is waiting for the reincarnation of their lovers. Other common tags are Immortal, rich male lead, death of lover, supernatural and a lot more....

Both series depict stories of idol turned actors also boss employ relationship and their cohabitation.................................................................................................