i met her once a month, my girlfriend shirasaki.

Not "her" but "not a lover" just to find a convenient sex friend that let you pussy out! Once you enter the room with a girl who meets once a month, you will not be able to tell any of your waste stories at all. She wants to be a little more advanced relationship, but she is using a little love feeling and eventually it becomes an eccentric relationship. And if you ask me a little, I will record the best convenient and pleasant days for the man who can even let you go out of town.