While Sato's investors receive automatic alerts of his fraud, Hotaru vanishes into the dark sea via a pre-staged jet ski.

The fan community is currently obsessed with a single question: Who is the man in the white suit? A background character appears in three panels of Volume 4, always watching Hotaru from a distance. No dialogue, no name, just a distinctive white suit and a pocket watch. The leading theory is that this is Hotaru’s father—the man she is hunting—who may have faked his own death. If true, the "top" of Volume 4 is actually just the setup for an even higher peak in Volume 5.

Based on the progression of the series (where New Hotaru 1 and 2 dealt with telephone clubs and host club scams), a fourth volume typically escalates the stakes:

While this article praises Hotaru the Hyper Swindler Series Vol 4 Top as the best volume, it is not a jumping-on point. The emotional payoff and tactical genius of Volume 4 only work because of the foundation laid in Volumes 1-3. You need to see Hotaru win easily to appreciate how much she struggles here. You need to see her cold indifference to appreciate her vulnerability. Start at Volume 1. Trust the process. The climb to the top is worth it.