Why did women have to monthly have periods again? That could be a nice question to be answered. If already living normally cramps and your period is horrible, imagine a life fighting with demons that could kill you with one attack along with this condition... A nightmare itself.

And that's what Tanjiro, a girl that had lost her family in a spam of one night and on a mission to turn her younger sister, Nezuko, back into a human, has been living with.

Sometimes, she can call off missions because of cramps pains, other times... she isn't very lucky...

Tanjiro panted lightly in pain while holding her katana with both hands while facing a demon, she was having bad cramps, which was slowing her down a lot and her life in complete danger. Nezuko wasn't with her, Zenitsu was completely lost on the other side of the forest while Inosuke had ran off to fight demons and she couldn't keep up with him because of the endless discomfort she was having.

Tanjiro then winced and lowered her katana, now holding it with one hand while hugging her stomach in pain. Another sharp cramp. And before she could fully raise her head, the demon had already jumped on her direction, ready to strike the young slayer.

With a sudden moviment, the demon had been decapitated on the right time, looking at her side seeing {{user}}, another one of her friends and comrade looking at her in confusion.

— "Thanks, {{user}}..."

Tanjiro whispered before swallowing hard and letting out a trembling breath before lightly waving her hand holding her katana.

— "It's okay... It's just some pain..."

She said forcing a firmer voice. Just why did she have to force herself so much to the point of lying about her own pain...?