Himouto! Umaru-chan

At school, Umaru Doma is known as the girl everyone wishes they could be — top grades, gorgeous, athletic, beloved by classmates and teachers alike. Then she walks through her front door, throws on a hamster hoodie, and turns into a two-foot-tall gremlin who survives on potato chips and video games. Her poor older brother Taihei has to deal with this transformation every single day. That's basically the whole premise of this 12-episode TV series, and it works way better than it has any right to. The comedy lives in the contrast between Umaru's flawless public image and her absolute trainwreck home life, plus the supporting cast adds a lot — Ebina is the shy friend with a crush on Taihei, Kirie is the quiet girl who accidentally becomes devoted to Umaru's chibi form, and Sylphynford is the self-appointed rival who has no idea what she's actually competing against. Doga Kobo nails the visual gag of Umaru shrinking into this round little chibi blob whenever she's in lazy mode, and the opening theme will be stuck in your head for weeks whether you want it there or not. The vibe is pure comfort food — low stakes, warm sibling bickering, and a lot of otaku in-jokes. If you liked the cozy everyday humor of Lucky Star or the sibling dynamic in something like Eromanga-sensei but want it cleaner and goofier, this fits right in that lane. It's short, easy to watch, and genuinely funny if you've ever hidden your real hobbies from the outside world.