The usual dumb nonsense concerning this manga that everyone's already cited/referenced/observed aside -
This is all being narrated by Shirota from the future, right? The brief bits of internal monologuing from him, like at the end of this chapter, has appeared before; which all alludes to this being like a recounting, or Shirota narrating the goings on to someone at some point well after all these events have taken place.
I think more than anything else, I want to see the ending and who Shirota is talking to (assuming it's not just "the fourth wall that is the reader"), and whether he's happily(?) with Takamine as an adult, or if he finally ended up in prison over some nonsense done to him, or something.
I kinda don't think we'll ever get there, but I admit I'm officially intrigued by that one little tidbit.