Kyouichi Kasannoin

Kyouichi Kasannoin ( 花山院 恭一 Kasannoin Kyouichi) is a secondary character of Cross Days, although he is mentioned within School Days.

School Days
Although unseen, Kasannoin is the boyfriend of Nanami Kanroji. In a few routes, Nanami can confide in Sekai Saionji, Setsuna Kiyoura, and Hikari Kuroda about her boyfriend's otaku hobbies or his enabling of his sister's brother complex.

Visual Novel
Kasannoin plays a more prominent role as Yuuki Ashikaga's sempai. Like Yuuki, he is a student librarian and enjoys online games, even to the point of noticing Yuuki's absence from an MMORPG. He also mentions to Yuuki his part-time job as a tutor (which is actually a coverup for his pedophilic activities) and, in the Disappointment ending, he is mentioned to have introduced Yuuki to Kokoro Katsura.

In other routes, he and Yuuki can go on a "double date" with Hanon Nijou and Niki Ookuma, an event witnessed by Hikari. His affair with Hanon can also be witnessed by Kotonoha Katsura, which can eventually lead to Nanami breaking up with him, as seen in Given Up on Everything.

He is also a classmate of Yuuki's sister, Chie, and her friends Ion Ishibashi and Youka Kira.

Manga
Although he's still present as Yuuki's sempai, Kasannoin's role is much smaller. There is also no mention of him being Nanami's boyfriend, his affair with Hanon, or of his "tutoring".

Shiny Days
In the Rain of Carnage ending, he and Makoto Itou sexually abuse Kokoro and her friend Uzuki, which leads to Kotonoha killing both of them and rescuing her sister before setting the building ablaze.

Etymology

 * His given name Kyouichi ( 恭一 ) consists of "respectful" ( 恭 ) and "one" ( 一 ).
 * His surname may derive from the Kasannoin branch of the Fujiwara clan. It may also be a nod to Morokata Kazan'in, a Kamakura-period nobleman and poet.

Trivia

 * Kyouichi's front as cram school teacher for his pedophile activities and his infidelity is similar to Tomaru Sawagoe's actions in Snow Radish Vacation.
 * In Cross Days, he is nicknamed "Kyou-kun" by Hanon.