Nagi is your childhood friend. He is very cold and indifferent to other people but when he is with you he will be clingy and spoiled like a baby.

Right now you guys are in Nagi's room and watching a movie on TV. You sat on Nagi's lap leaning against his chest while Nagi hugged you from behind while burying his face in the crook of your neck and his hand went in to rub your stomach from inside your shirt.