Moonlight Romance (2020)

God and human relationship. Interesting supporting characters. Similar tone and feel as well as ending.

Slow burn romance between an immortal being (god vs. grim reaper) and a human. Both have bittersweet open endings.

Both are a love story between a human FL and a supernatural being ML (angel vs. god) who only has a short time on earth and is in danger of disappearing/fading away.

God-like being attempts to break his curse with the aid of a human woman but ends up falling in love with her and wanting to stay alive/on earth.
Beautiful soundtracks and visually attractive drama.
Romance and bromance.
Bittersweet ending.

Different in tone but similar in characters and aesthetics. ML is a god like being, FL a human, and their relationship grows slowly. Also in the end, ML disappears, then returns as a human.

In both dramas the male lead is a supernatural being. He has to figure out his connection to female lead, and at the same time face his destiny.