The residents of the apartment complex Amamizukan all share a unique interest of being socially awkward otaku NEETs. They live by a strict code of never talking about their social impotency, never letting guys into the Amamizukan, and never becoming one of the stylish, those with fashion sense.
When the youngest of the girls, Tsukimi (a jellyfish otaku), ends up meeting a stylish girl (Kurako) who helps save Tsukimi's precious jellyfish Clara, her anti-social life is threatened. Tsukimi is now on Kurako's radar as she tries to befriend her and make her way into the sanctuary of the Amamizukan. When things seemingly couldn't get any worse, Tsukimi stumbles upon Kurako's biggest secret: Kurako is actually a cross-dressing male from a rich political family.