"I thought that we were friends..." A group of young adults rented a house to stay and hang out over the summer. Little do they know, there was another child with them, and everyone is disappearing one by one.

"I'm Misaki! Don't you dare call me Yukisa!" What's this!? What's going on? Misaki who is a princess in the Kingdom of Marino is the new heir, yet she ran away? Yukisa who is daughter of the secret most powerful family of Marino, but died? As Misaki/Yukisa go on the journey, there will be danger, enemies, friends, and love.....