Man, I binged this whole thing in one sitting last weekend. It's basically about this high school guy, Ryunosuke, whose neighbor is this terrifying-looking delinquent girl, Akutsu. She's got the dyed hair, the scowl, the whole package. The twist is she's got absolutely zero life skills and keeps barging into his apartment because she's locked herself out, or hungry, or bored. The plot is just their daily interactions—him trying to study and be normal while she crashes on his couch eating his food. It's a rom-com but the 'rom' is so slow-burn it's practically frozen; the comedy is all in her oblivious invasion of his space and his exasperated but weirdly tolerant reactions. The main thrust isn't some grand narrative, it's watching this tough-girl facade slowly crack around the edges when she's in his room, revealing someone who's just kind of... lost and maybe a little lonely. It's less about a plot and more about the vibe of this weird, co-dependent routine they fall into.
I kept waiting for a big confession or a rival to show up, but it's more slice-of-life than that. The 'plot' is just the two of them existing in this tiny space, and how that forced proximity changes their relationship millimeter by millimeter. The last chapter I read had her actually asking him for help with homework, which felt like a huge milestone. It's the kind of series where the main event is her finally learning how to use his rice cooker without breaking it.