From the author, Nakahiro, who is famous for his script of "Hoshizora no memoria", "AstralAir no Shiroki Towa" etc visual novel, [ Nii-san.....help me......the game] This is what Umi heard when he came to wake up his younger sister, Sora, who is unusually late. He thought "Just how much did she love gaming?" Umi doesn't play game that much so even if she asked for help, he doesn't know how. Entering her room, he saw his sister sleeping while holding a controller. The power is still on. Moreover, both the console and the game-screen feel like it is from ages ago. Looking down, he saw his hand holding a controller without realizing. It is already late and he knew that yet... [Why did I..?], he wondered. The controller in his hand is different from the one his sister is holding. It is a so-called 2P joystick. Wanting to test, he clicked a button. Sudden voice effect surprised him and in the next moment, his consciousness was cut off. When he realize that his sister cry for help wasn't a metaphor or exaggeration--------- GAME START!