Responses
no that is not the case in this story.....
spoiler.....warning...
it´s rape..often...
ohhhhhhh....
well... hmm... （￣へ￣）
Maybe the character is intersex. There are many forms of it, so a person can have "that thing" with no breasts, and still have periods. There's a manga that I've read into which explained the topic pretty well.