Vol 1: Yu complains about manga fanservice as the girls are taking a bath. 
Vol 2: Yu and Miyuki comment on a stray porn mag. 
 
Note: Published in two separate issues of Young Jump GOLD; these are side-stories to the main series and not included in any volumes.

As leaders of their prestigious academy’s student council, Kaguya and Miyuki are the elite of the elite! But it’s lonely at the top… Luckily for them, they’ve fallen in love! There’s just one problem—they both have too much pride to admit it. And so begins the daily scheming to get the object of their affection to confess their romantic feelings first… Love is a war you win by losing.
 
(Source: Viz Media)
 
Notes: 
- The first 10 chapters were published in Monthly Miracle Jump. It switched to Weekly Young Jump starting with Ch. 11, with the chapter count being reset. This entry still includes the first 10 chapters from Miracle Jump. 
- Winner of the 65th Shogakukan Manga Award for "Best General Manga" category in 2019.

OVA adapting both chapters of Kaguya-sama wa Kokurasetai Darkness and Chapter 96 of the main series.

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