Sukimamono

Mitsuno Hiiragi is an ordinary high school student who works part-time at a convenience store. His routine is troubled by a strange-looking woman with a contorted body who visits the store every night. Desperate to do something about her, he decides to test a rumor that has been going around town, half-believing it. Instead, he is greeted by Tsutsuji, a mysterious beauty who calls herself the "Filler." "Sukimamono"—gap monsters—are strange creatures that have strayed into the human world. Tsutsuji seems to make a living by "doing something" to them. She is extremely beautiful, yet no matter how one looks at her, she remains suspicious, shady, and simply strange. Swept away by these events, Hiiragi tries to uncover the woman's true identity together with Tsutsuji, but...