1girl, air conditioner, bag, bangs, bow, ceiling, ceiling light, comic, curtains, english commentary, english text, greyscale, horror (theme), implied yuri, linnea kataja, monochrome, neckerchief, opening door, original, pentagram, photo (object), plastic bag, school uniform, serafuku, short hair, short sleeves, silent comic, sliding doors, solo, sound effects, trash bag, yandere