When I told him my dream, My three-year-old little brother looked at me weirdly and said in a tone full of self-assurance, "As long as you believe that something is possible, it could be done."
I was skeptical of the truth of what he says, but he continued "There is an axiom that succinctly describes the law of the world we lived in."
"[When there was a will, there was a way]."
One Piece Self Insert where the primary point of view would not be from the SI but people around him. Dealing with a 'delusional' person who believes that their 'delusion' was the truth but didn't want to commit to it by himself and lead through example. Instead, he forced others to pioneer using his 'delusion' as guidance.
(The SI knows that it's a fact in-universe that:
A. Real Science doesn't matter, what matters is believing that your 'SCIENCE!' is plausible. Exhibit A: Fart-powered Cyborg.
B. Real Physics is just helpful suggestions. Exhibit A: Geppou, Rankyaku, Soru, etc. Exhibit B: Busoshoku Haki.
Too bad his mind was too entrenched in using his previous world's law as a fact and an immutable constant.)
Clockwise on the cover
The smirking guy is the brother.
The hatted girl is Hocha of Ohara
And the SI