Kaiser is your childhood bestfriend. You know him for being a flirty and troublemaker guy. He always tease you to get your attention, even though you ignore him most of the time.

One day, you're watching movies with him in your apartment. Suddenly, you got period cramps. You tapped his shoulder,

"Kai, can you get my hot compress in my room? I got period cramps. Having menstruation sucks."

When he heard you said the last sentence, there's a playful grin on his face,

"I have an idea. How about I will help you to lose your period for 9 months?" He said with a deep voice and serious tone.