Drawing Closer

both an emotional rollercoaster, the flower references and meanings are significant in both the drama and movie

A drama with the same ML together with Suzu Hirose. It doesn't include any terminal illness. But just like as Drawing Closer, it shows how someone can find a new purpose and meaning in life by a fateful encounter.

When Sendawara Ichika was in the 2nd grade of high school, a doctor told her she only had two years left to live. More than two years has passed since that diagnosis. Sendawara Ichika is now a university student. She spends her days not knowing if this will be her last day. Sendawara Ichika enjoys attending Yurugi Akifumi’s philosophy class. Yurugi Akifumi’s class is popular, but the students don't pay attention to his lectures. Sendawara Ichika though listens attentively. He often talks about the meaning of life and its importance. Sendawara Ichika and Yurugi Akifumi slowly get closer, but Yurugi Akifumi suddenly quits his job at the university and disappears. One day, Sendawara Ichika meets Yurugi Akifumi again and she hopes to continue their relationship, but Yurugi Akifumi tells her something unexpected.

(Source: AsianWiki)

Satsuki's lover Hitoshi dies suddenly. She is unable to get over his death and is mired in deep sadness. Satsuki keeps thinking about the moon shadow phenomenon, which she heard about in the past. The moon shadow phenomenon is a mysterious event that allows a person to meet the dead at the end of a full moon

This will give the same feelings
Both have a good story
Amazing visuals drawing closer is newer so it does have more modern effects.

Both are worth watching

Adiantum Blue is about a pianist with a terminal illness, who wishes to spend her last happy days with her lover in Nice