Each chapter’s title was carefully chosen. All of them, with two exceptions ( Chapter 3 & 7), are a reference to either a song’s title, or a movie/tv show quote.
Chapter 1: A ref to the first arc of One Piece: Romance Dawn; but you knew that right?
Chapter 2: A ref to the Wizard of OZ
Chapter 4: A village people song. Since Rick is joining it.
Chapter 5: 8 miles’ sound is really motivational and since Rick was running for some miles….
Chapter 6: I’ll make a man out of you. Song from the one and only Mulan film (199x)
Chapter 8: Title of an against the current song.
Chapter 9: One of the songs of Aladdin.
Chapter 10: A Gloria Gaynor song
Chapter 11: an Avicii song
Chapter 12: Quote from the movie Apollo 13.
Chapter 13: I kinda forgot, sorry : /
Chapter 14: Dirty Harry
Chapter 15: A quote from Game of Thrones
Chapter 16: THE quote from the movie Forest Gump
Chapter 17: A linkin park song
Chapter 18: A Dexter ref ( Tv shox) and a meme
Chapter 19: Famous quote from the movie Shining
Chapter 20: A common trope !
Chapter 21: From the godfather
Chapter 22: Army of darkness ( evil dead 3) or Duke Nukem reference.
Chapter 23: part of Mozart’s requiem
Chapter 24: Song from the band Scorpion
Chapter 25: from Aladin
Chapter 27: Title of a bunch of good movies
Chapter 28 : Name of the last chapters just before Bleach became boring.
Finding a tittle that way is not efficient. It's the hardest part when I write actually. But I'll do it until I can't do it anymore.