Both are about baseball and have a friendship/romance relationship between the leads.
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GMA is a Thai bl where a girl gets to become a boy with the help of a unicorn in order to get closer to her crush! So both dramas involve gender change using magic!
Both are set in school and centered around sports. Both have the concept of childhood friends, with one returning after a long time only for the other to discover they are a different gender. One is fantasy, the other is not, though.
Both are short dramas about a boy who magically becomes a girl. Both involve sports (baseball vs. basketball) and have a High School setting. Both leads become romantically interested in their male childhood friend.
-Leads were childhood friends but had to leave each others' side and met several years later as adults but with a twist of unexplainable gender switch.