Recommendations

They aren't exactly prequel and sequel but they have the same format:
- Main actors who play a fictionalized version of themselves.
- Every episode is a different story (and they are not related to each other).
- Every episode is directed and written by a different director and screenwriter.

Both are mini dramas with a visually impaired ML and the FL who starts out as a servant/aide to him.

Both are mini dramas in which the ML is a disabled CEO with scheming relatives and the FL has abusive/manipulative relatives and is trying to protect her parent (father vs. mother).

Both dramas have the same actress as the FL and are about a contract or arranged marriage between the FL and a wealthy CEO that turns into true love.

Both are mini dramas in which identical twin sisters with very different personalities are forced to trade places by their parent/parents, leading to one marrying and falling love with her sister's rich fiancée.

Both are mini dramas in which an abusive parent forces the FL to take the place of a sister or family member and marry the wealthy disabled heir of a family the other girl was supposed to marry. The FL is protective of him against his scheming family members and the two fall in love.

Both dramas involve identical twin sisters who swap places, leading to one marrying and/or falling in love with the man her sister was supposed to be with. Both sisters have vastly different personalities, one good and one evil.

Both dramas involve identical twin sisters who swap places, leading to one marrying and/or falling in love with the man her sister was supposed to be with.

Both are mini dramas in which identical twin sisters trade places, leading to one falling in love with and/or marrying her sister's fiancée.

Both are mini dramas in which identical twin sisters trade places, leading to one falling in love with and/or marrying her sister's fiancée.

Both dramas are romances and have a visually impaired ML.
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Both are mini dramas with a ML who is visually impaired (in some way) following an accident that was later discovered to be intentional, and a FL who enters his life under false pretenses. Both leads are in a form of design (perfume vs. jewelry).

Both are mini dramas with a visually impaired ML and a FL who enters his life under false pretenses.

to me this drama has a similar vibe., as in how they use their scenses. they main characters, will work together.,

Aside from being both dating shows, the sand wrestling episode of Love Alarm reminds me of Single's Inferno. I wish they also made a small pool with water too because wrestling in sand looks so painful.