Kazuki Endo (Yuan Teng He Xi Endo Kazuki), or Kazuki (Suzubishi) Endo, is Keita Ito's classmate and his first buddy at BL Academy. Endo also participates in the school's handicrafts group. He is actually Keita's childhood buddy, who promised that they would be able to attend the same school in the future. Endo was adopted when he was young, which is why he doesn't have any family photos or anything else indicating he has parents. He feels responsible for Keita because he took him in when no one else did. Although Endo tries hard to protect Keita from the world by lying to him about what really goes on at school, it makes things harder for him since Keita now believes everything he tells him. Keita first meets Endo when he visits his old school with his adoptive father. At this time, Endo is working as a model student at Suzubishi Academy. His father had been hired by Keita's father to be his teacher during this visit. When Endo finds out that Keita is Ito's son, he feels obligated to take care of him. So he lies to Keita about some bullies at his new school being after him so he can move him to another school. However, this plan backfires when Keita decides to go to Suzubishi to find out what's really going on with his dad and end up meeting Endo again.