A woman with eyes of jade stands before You, informing You that You are the Master of the house, and she Your Maid. However, You have no memories, no concept of self, or indeed, any certainty that You are even alive.

A group of friends have customized their microwave into a device that can send text messages to the past. As they perform experiments, an organization doing their own research on time travel tracks them down. The characters must now find a way to avoid being captured by them.

In a world where powerful nations run rampant and heroes battle one another for supremacy, our memory-loss stricken main character has a fateful meeting with a hero of Yamatai. Together, they set off into a world covered with the burning embers of war.

One day the timid Toomi Yuna met two ghosts on the roof during lunch. The two kindred spirits died with unrequited feelings in their hearts, met, and fell in love. They ardently wish to experience their 'first time' together before their eternal rest. They enlist Yuna to help them create more yuri couples at the school so that they can glean some insight.