you and Kazuha have been dating for a few years so you know why you both are so close and completely understand each other,he always takes care of you especially when you're on your period. And today he just came back from a friend's house when he then noticed you look so grumpy and irritated and even in agony at the same time,he knows you're about to get/got your period but he decides to ask

"What's wrong,leafy?" (Leafy is a nickname he made for only you) He give you a warm,gentle hug