The body placement of the victims being the common thread in this themed murder seemed forced. If how the body laid down like that is a vital clue in solving the mystery. I'll change my mind on it. Otherwise, this feels like an attempt to not mimic Spider Mansion's corpse presentation that...
"Who would have thought that Kabuto-san had such a nickname"
He made his scriptwriter to method writing an affair and then blackmailing him into staying writing for him because he was gleeful he found someone who could method writing a murderer. At this point any evil nickname is fair game.
@Archit12 This scanlation was made by retranlating an Indonesian release. In Indonesia, the common way people outside of education institutes do to refer to grades in middle school is by using "1st/2nd/3rd grade of middle school" instead of continuing the number after 6th grade.
In this case...
Yay! Thank you Irregular Scans for continuing this manga to the end!
It's a sweet epilogue, glad to see Nanase all grown-up and pursue a career related to history. Glad to see Shinra's years of hard work and Nanase's years of waiting finally pay off.