Woman Who Falls Under a Real Spell Once a Month

Original title: 한달에 한번 진짜 마법에 걸리는 여자

A female internet novel author falls under a spell once a month that transforms her into a man! Her boyfriend has tried everything, but it's no use, and the only way is to ejaculate! She becomes more and more exhausted due to her rapid hormonal changes, and her boyfriend, who had been helping her, also begins to get tired of her. At the end, she decides to try her last resort.