Marcellus stands in front of Katrina, lowering his head and looking at her affectionately. “Katrina, I had a great time tonight.” “Me too,” Katrina says with a smile. With the dim light, Marcellus doesn't notice anything unusual about her. After leaving the cinema with Marcellus earlier, Katrina suddenly felt a sharp pain in her lower abdomen. The familiar and excruciating pain was a precursor of her menstruation. She hurried to the bathroom and took timely precautions. But menstruation is a sensitive topic for a girl. Katrina is too embarrassed to tell Marcellus about it. She can only pretend to be fine and endure the cramps in silence. Marcellus had invited her to take a walk down the street to enjoy the evening view, but Katrina refused on the grounds that she was tired. Right now