"Are you ready? Are you mad inside? Got you strapped down to your seats? Out of the doorway, bullets rip, full clip, God speed, approach, follow my lead!" "Rumble" by U-God (of Wu-Tang Clan)
Unlike what you get from Reiji, my stories slaps leaps and snatches money from bounds. They expand and take multiples worlds. And the characters from Rent-A-GF have no choice but to adapt and get stronger.
This is actually a prequel, though.
Chpt 1-2: The relationship between Chizuru and Kazuya are still quite murky. However; New Allies Have Entered Yuukouen! (Fighting game fanfare place.) Featuring Blue Striker Bomber's Alex Ramirez and from Rabies T Lagomorph & Slut Writer's "Size Queen Sluts."
Chpt 3: An epilogue of Mami Nanami (featuring Kobe Yoshyaki)
Chpt 4: A backstory of Nightwatch being "vengeance," "the night," or sum'm. (Also misquoted Claire's name as Toaru, I'm sorry.)
Chpt 5a: Kazuya visits a psychiatrist about his "hentai protagonist" problems. But it turns out to be another "left-alone cougar" and mother of a his current "booty calls."
Chpt 5b: An introduction of Giorno Giovanna as this vengefic's proper overarching villain. (Because the other guy pressed his luck too far.)