Double Subverted: ...But once he emerges from his mind, he finds out he's stuck in a strange, unrecognizable land.
Parodied: "Aw, damn." Kenta said. "On Monday, it was the mirror sucking me in. Today it's a dimensional rift in my closet..."
Zig Zagged: Kenta opens up that forbidden door in the basement and ends up in a strange world. But there's something familiar about the place, despite the strangeness. Furthermore, he always felt like an outsider in his "real" world while this world makes a strange kind of sense. There's also this rumor about a lost kid, and the dates match up to the day he was found by the cops without a family...Does he really belong in the world he came from, or is the strange place his real home?
Averted: The adventure takes place in the same reality as the protagonist.
Enforced: "No one's gonna believe this stuff could happen in our world. Pitch him down a rabbit hole or something!"
Lampshaded: "Hey! How'd I get here? (looks around) Aw, hell. Now I'm gonna have to find a way back."
Exploited: Kenta's Genre Savvy enough to take advantage of Strange World's rules and take it over.
Kenta acquires some kind of device, relic or knowledge that allows him to close inter-dimensional portals; he's way too comfortable in his own dimension to risk himself getting caught in one of those annoying psychedelic vortexes!
Discussed: "Kenta, ever notice no one comes to this reality willingly?!"
Conversed: "Ladies and gentlemen, fellow Tropers, ever notice how the tropes that gave us Wonderland and Oz become the gifts that keep on giving?"
Unaware and unfamiliar with the new world's customs, Kenta keeps digging himself deeper while struggling to adapt to the situation. Since most people are unaware that he's a Fish Out of Temporal Water — and those who do learn of this tend to think he's just plain nuts — he finds precious little empathy, making it even harder for him to survive.
The world Kenta is transported to has entirely different physical laws, which proceed to tear him apart.