Although the premises are different there is a similar concept of life and death regarding how Girl gun lady and Gantz games are played.

The game impacts whether if the player gets to live or die in both parallel and the real world.

Both use guns as fighting weapons against a common enemy

Gantz has a darker and violent tone compared to Gun girl lady's toned down and less graphic violence.

Both main protagonists tend to put others first, and we as audiences hear their internal thoughts throughout the series. If you are seeking for another show that involves workplace setting this show may be for you.

Other similarities include:

Both include a comedy genre
Confused male lead
Gay character
Discovery of co-workers feelings
Both ML's surnames are 'Kurosawa' o.o
Confident ML's are considerate of Confused ML
A similar pattern of relationship build-up (Slow burn)
Features well-known actors

The gap between Cherry magic and Ossan's love:

A smaller circle of characters introduced in Cherry magic compared
to Ossan's love's range of AB list actors.
Ossan's love tends to explore more topics that touch upon reality
while Cherry magic focuses on the fantasy elements
Cherry magic has a fitting ost and the opening song
Cherry magic's Kurosawa is portrayed to have common sense and understanding of ML