It's the second par of the comic Christy in Japan : /g/1983629/3080b2e1ed/

After being invited to her sister's lawyers' convention, Christy meets a mysterious young man for whom she begins to have feelings.

He proposes to her to use her father's wealth to go for a weekend in the small village of Itomori.

But the next day, it's Valentine's Day and Christy still has the nanomachines that change her sex for "Equality Day".

Christy then thinks of confessing to him that she is not really a woman, but this revelation will not go as planned

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What an asshole! If the dick bothers him that much he can hug her from behind.

Base +6