Imouto Sae Ireba Ii. @comic - Vol. 3 Ch. 13 - Cat And Chocolate (School Arc)

[MangaDex]

 

[kcSaya]

oh right it's this story

 

[Usarin]

Hey, that's totally Saya xD
Also,
https://www.youtube.com/watch?v=uoBi7woa7B0

 

[geistchevalier]

I remember reading a manga with a similar theme where the little sister is a monster, although not a 100% of the time. She would literally eat bits of her brother due to her monster instincts. Can't quite remember the name though, the name had something to do with chrysalis

edit: nevermind I remembered it

https://mangadex.org/title/8728/pupa

 

[Hachi015]

@geistchevalier Ahhh remember Pupa when the flesh eating genre suddenly boom way back 2012 good times good times

 

[Simpleton]

The boardgame they are playing on pages 8 and 9 is Ghosts : https://en.wikipedia.org/wiki/Ghosts_(board_game)

 

[ampnaman]

A chapter ago DND, now it's Lovecraftian... I'm starting to like this manga.