Hina is a ballet girl who is working hard in her late-night lessons to prepare for the spring ballet competition. The older brother watches over his younger sister in her supple leotard, his eyes filled with an inhuman desire. The girl who responds to his uncontrollable love is also unable to control herself, and the siblings eventually open the forbidden door… I want to tell my feelings to my senior whom I adore! Suzu, a shy junior ballerina, sneaks into a ballet class late at night and witnesses a lewd lesson between the siblings. The girl comforts her burning body. And a shadow creeps up on her, sensing her scent… The tentacles of those who dwell in the magical space devour the buds of the girl who does not know defilement…!