This is an adventure story about a cheerful, sharp-tongued youngest child and a playful, somewhat flirtatious boy.
Both protagonists are cheerful, over twenty, and consenting adults. They say what's on their minds and are both straightforward with each other. Neither keeps things bottled up and makes the other guess.
On this continent, wizards are a special race with true magic who can also choose their own gender. In this world, the protagonist has no gender. The text uses "he" because an elementary school teacher once said that "he" can refer to someone whose gender is uncertain. Please don't assume the protagonist is male just because the pronoun is written with the masculine form. It's categorized as romance because most of the other characters are straight.
You can read this as a standalone story, or as a novel featured in the drama Star Tracks from next door.
Theme: I like you for who you are, regardless of gender. Come to think of it, you don't have a gender either.