Hitoribocchi no Isekai Kouryaku - Vol. 13 Ch. 140 - The Ultimate Protection

[MangaDex]

 

[Xeroxcopy4free]

looks like the angel version of skeleton key in elder scroll games

 

[Otherworlder]

I like how even after all this time the MC stubbornly insists on getting absolutely everyone's names wrong. Well, except he's finally started calling Angelica by her name. Not only do they answer to the wrong names now, but they've even caught on with others, like how all the girls call Invisible 'Stalker-chan', or how Prez referred to one of her classmates as 'Poster-chan' several chapters ago.

Using a magic key that was never shown before, even though he's had it since the Great Labyrinth, is kind of an ass-pull. It would have been better, and funnier, if he just casually picked up both girls and teleported inside.

 

[AcelJean]

Well that key was a total ass-pull. At least there's a believable reason. Not a random skill he had but never used before

 

[ABC4524]

Using a magic key that was never shown before, even though he's had it since the Great Labyrinth, is kind of an ass-pull. It would have been better, and funnier, if he just casually picked up both girls and teleported inside.

Well that key was a total ass-pull. At least there's a believable reason. Not a random skill he had but never used before

Idk why you guys are calling this asspull. This key was clearly shown back in chapter 52 page 10, it was just never used till now. I can still understand @Otherworlder, they were probably reading the chapters as they came out so they could not remember every single detail. But I am assuming @AcelJean only recently started reading this manga, so they should've remembered this detail..

 

[Otherworlder]

You're absolutely correct, @ABC4524. It's right there in a pile with a bunch of other magic items. 88 chapters from introduction to payoff., that's some Goblins Comic level of delayed callback.