Pairing: Oikawa x Kageyama Two stories about the use of first names between Oikawa and Kageyama. Part 1: A story from their Kitagawa Daiichi days about Oikawa-san, who wants to be called 'Tooru-san', and Kageyama-kun, who can't call him that. Part 2: A story from their college days about Oikawa-san, who doesn't want to be called 'Tooru-san', and Kageyama-kun, who wants to call him that no matter what.