Class troublemaker Ryu Yamada is already having a bad day when he stumbles down a staircase along with star student Urara Shiraishi. When he wakes up, he realizes they have switched bodies—and that Ryu has the power to trade places with anyone just by kissing them! After figuring out the workings behind this new and amazing ability, Ryu and Urara take full advantage of the situation to improve their lives. But with such an oddly amazing power, just how long will Ryu and Urara be able to keep their secret under wraps?

One day, high-school boy Yamada bumps into the beautiful girl Shiraishi on the stairs (literally), and their lips touch as they fall. When they regain their wits, they realize that they have swapped bodies. As time progresses, the two realize that this is not the only mysterious happening in the school.

Set in Akihabara, the shopping area has been invaded by creatures known as "Synthisters" who prey on the patrons of Akihabara, feasting on their social energy and will to live. These enemies can only be stopped by direct exposure to sunlight, meaning to defeat these synthisters their clothes need to be ripped off exposing them to sunlight.

An Urban Legend describes monsters known as "bagurimono" lurk in dark corners of Akihabara, the paradise of anime. When Tomotsu Denkigai encounters one, he is almost killed but saved at the last moment by a girl name Matome Mayonaka, who repells the attack and later revives him.