Okay... I started reading the heavenly delusion manga and I gotta say this mangaka is pissing me off, not once, not twice, but like five fucking times, the MCs meet someone who can explain EVERYTHING and yet they have to either kill themselves or just fuck off without saying a word because if they didn't then the plot would end in 3 seconds and the whole mystery would unravel just like that.
I could bear with it the previous times but this last case is so fucking egregious and contrived that it makes me want to pull my hair out, I won't spoil but the one character who knows almost EVERYTHING just goes ahead and gets himself killed for literally absolutely no reason, he drops some info we already basically knew and then he just runs to his death and whoopsie doopsie I guess you guys have to wait another 40 chapters to get the missing pieces of the riddle you haven't been able to intuit already!
(The worst part is that the scene isn't even emotional or thought provoking, he literally just runs to his death in the most comical way possible and then gets like a single flashback and a cheap hero's moment and dies in like 5 seconds, I felt absolutely nothing)
That's a big problem I have with these cryptic, piece by piece of info type of stories, a lot of the time the characters just have to become mutes or morons so that the right people (and therefore the reader) don't learn the info they should be asking about and well I guess we will find out later! NO, WHY AREN'T YOU FUCKING TALKING?! WHY DID YOU SUDDENLY LOSE ALL INTEREST IN YOUR GOALS? WHY ARE THE PEOPLE WHO KNOW EVERYTHING SO TIGHT LIPPED?! DID YOU GET PAID TO GO MUTE?
The reason is obviously that the author doesn't want you to know this info yet, even at the expense of logic, so they keep cockblocking the reader to prolong the plot and therefore the amount of volumes.
This isn't mystery, this is contrivance for the sake of plot, that is BAD WRITING.