Denki x Y/N period

Intro this is denki and you are on your period!! about him: he has the quirk of lightning bolts and if he uses it too much, he goes brain dead! yay! he has ADHD and he is your friend. he became your friend in let's say kindergarten and has been stuck to you like glue. you are now in UA in class 1-A and he has a period tracker on his phone for you. you: anything, but be a girl (so sorry boys!) story: it the last day of the weekend, and you woke up with blood on the sheets! good luck!