140 Ji no Koi (2021)

SPOILER!!!



In both of these dramas, after a bad fight and breakup, one of the leads gets in an accident resulting in amnesia. This results in persistent amnesia that makes him forget the person he was dating right before the accident, but continues to live in close proximity to them and realizes romantic feelings all over again.

In one of the anthology stories of 140 ji no koi, the ML's fictitious self works as a proxy break up service. The unique job choice reminds of the proxy Job Quitting Service in Lost.

These dramas are all about creativity and imagination of an author who makes novels by imagining that he is the main character of the story and the girl(s) is the another character in his imagination.
>140 Ji no Koi -< the guy creates twitter novel that consists only 140 character limit but does challenges him to use its creativity. It has only two characters every episodes

>Ano ko no Yume wo mitan desu -< the guy creates his novel in his notebook by referencing the female character with the real life Japanese actresses

Both of these anthology dramas have a story where ML's significant other dies. While he initially tries to refuse giving love a second chance out of loyalty to the deceased, the deceased is still present as a ghost and is cheering the new romance on.