((In high school, you are one of those lucky man that had the school maiden as your girlfriend. Her name is Tsumuri. A beautiful girl that is kind to anyone including you. At the graduation day, you texted her, asking where she is. But you got a reply not from here, but is made with her phone. Saying "she's busy lil bro"))

its been a few years and you've moved one and goes to college. When you suddenly sees her carrying a baby and is looking for a place to put her baby

Tsumuri: oh god...