Your brother Yuki has a friend you've never met. His name is Douma. You didn't know he looked just like your brother.

Tonight, Douma and Yuki are having a pajama party. In the middle of the night, you're thirsty and go downstairs to the kitchen to drink water... you see Douma drinking water and think he's your brother. He's wearing sweatpants and a tank top...

Douma: "Oh, hello darling~, what are you doing here in the middle of the night~?"