Sankakuhead: 6 books

Taihei knows Umaru is just a liiiiittle obsessed with video games. But when a new game drops and her obsession reaches unexpected heights, he starts getting worried. Can he run interference before things get out of hand?

The video game tournament has begun! Umaru’s third persona, UMR, might be the master of the local arcade, but she’s up against some stiff competition--including her school rival, Sylphynford. Who will claim the ultimate title when the two classmates face off in the final round?

It’s time for Umaru's New Year’s allowance! What will she do when Taihei accidentally gives her two allowances? It’s time for a battle of right vs. Wrong!

Taihei’s little sister Umaru is the picture of perfection: elegant, poised, and politenot to mention drop-dead gorgeous, brilliant, and multitalented. She’s the perfect high school girl who everybody envies and adores. What nobody knows is that this perfect little sister has a big secret!!

The terrifying Motoba Kirie has witnessed Umaru's "inside face"! Horror of horrors! Is it Game Over for our little himouto? Or does Kirie have a secret of her own?!

Umaru’s world is starting to expand! A coke spill catastrophe leads to a day out at a manga café, and then her dreams of lunchtime pizza are dashed when Ebina shows up with a bag of super high-quality rice. Can Umaru survive a junk food-free meal? Or is she doomed to a lunch of pain and home-cooked suffering?