Kudou is Tsukasa's classmate. He is assigned to the same group as her on the school graduation trip, but is too intimidated by Ryuuji to try to befriend her. Some time later, Kudou begins acting more confident and forward with Tsukasa and confesses to liking "him". He used to wear thick glasses but stops wearing them as part of his "makeover". He claims to "hate girls" and considers them shallow and mean, so he has no issues with dating Tsukasa, whom he believes is a boy. This burst of confidence was caused by Kudou taking the drug distributed by Garyukai. Tsukasa realizes that the normally meek and unassuming Kudou turns violent whenever he hears the name "Shirogami", and decides to fake-date him in order to investigate.