Shiretto Sugee Koto Itteru Gal. - Shiritsu Paranomaru Koukou no Nichijou - Vol. 3 Ch. 20 - Behind you kinda deal

[liobi4]

Riko went full landmine and tripped a Yuri flag~~ also Merry-san being the powered teen version of Mary-san really did make me laugh

 

[liobi4]

I like this chapter, but it feels inconsistent in that the landmine girl, and even the gals, acted in a way they should have.
How did landmine girl do all these things? No answer.
How did the gals call her? Unless they already had her number, they would have never known the answer.

I could conjecture that the gals were actually guiding landmine girl to do this, to get the best result, but I'm doubtful of that.

There's been other hints that Riko knows all the personal info of everyone from her school and has always had the potential to go full yandere/landmine girl, but she's a good kid and never used that stuff for evil. She mentioned that Merry needed to stop doing that kind of thing, so after it happened to some of her friends she likely made preparations in case she was ever the target.

As for Mirai calling Merry, she can get info from the future even if it doesn't have a source (like seeing the number she was going to call to let Merry know she'd get scolded if she was late for her date with Riko). She probably has also already seen the future where all of them are friends

 

[liobi4]

Why did I say

There's been other hints that Riko knows all the personal info of everyone from her school and has always had the potential to go full yandere/landmine girl, but she's a good kid and never used that stuff for evil. She mentioned that Merry needed to stop doing that kind of thing, so after it happened to some of her friends she likely made preparations in case she was ever the target.

As for Mirai calling Merry, she can get info from the future even if it doesn't have a source (like seeing the number she was going to call to let Merry know she'd get scolded if she was late for her date with Riko). She probably has also already seen the future where all of them are friends

Why did I say hints, she literally tells the black gig guy her hobby is finding and collecting people's personal info

 

[Nulll]

This won't spoil the manga but can possibly spoil the original Youtube series

Spoiler

There was a completely unrelated arc about saving the world from ending. But as far as I can remember, the two gals have never fought against each other in the original Youtube series, which means the plot of chapters 17 & 18 was completely original to the manga. Source: I watched all the non-summary videos from the channel.

Here's the compilation video on that arc about saving the world btw

The arc where the gals prevent hikaru and kuroi from destroying the world ( hikaru because of getting frustrated with a game and kuroi from having his middle school poems leaked )