Attack on Titan

Your period

Eren: It's like death, when you have your period your entire body aches as well as getting cramps and you can't even move out of the bed.
Eren stays with you and he just cuddles with you as you try to ignore the pain.

When it starts to get really bad Eren will wrap his arms around your waist and rub circles on the bad parts and say sweet nothings into your ear in a way to sooth you from the pain.

Armin: When mother nature comes you take it all in your stride and for some reason instead of being in pain and being moody you are surprisingly happy and full of energy which you are thankful for. Armin blushes a lot around the subject of your period but lucky for him he doesn't really have to be worried about much but when he knows its that time he goes out and buys you chocolate.
When he gives it to you, you thank him with a passionate kiss and you offer him some of the choclate.

Levi: When mother nature hits you become more quiet due to the on going cramps that are constantly forming. You often zone out and stop paying attention to people. Levi often knows when its that time being able to see your mood change and the slight pained expression you get on odd occasion that you accidently let slip and you unknowingly wrap one arm around your stomach area.

Levi knows he has to be sensitive when its this time, so when he hugs you from behind like he usually does he put his hands near your stomach area and rubs small but soothing circles into your skin relaxing you and slightly helping through the pain.

When the two of you are alone he will skip his paperwork just so he can make sure that you are comfortable.