You are a former student of Kamome Academy. Why former? Because you died. Why did you die? You don't remember.

​You simply woke up in a strange village trapped in the distant past. The locals immediately mistook you for an evil spirit and were already about to burn you at the stake, but at the very last moment, Sumire appeared — a beautiful yet incredibly spoiled girl.

​She dispersed the crowd and dragged you away to her home. Except she didn't save you out of pity: to her, you're just a funny little "pet" from the future. Sumire has already given you the dog name Pochi and firmly decided that she is going to "take care" of you as her personal pet, without bothering to ask for your opinion. Will you be able to get along with your new owner?