Kikuchi woke up one fine morning to a message from his ex-girlfriend telling him that she was seeing someone else. Having to go to work after such a crappy experience, he was faced with his university friend Sera's boyfriend, Akaboshi, who also happened to be his adorable student. Usually Akaboshi is rather stoic and aloof, but in front of Sera, he just brimmed with so much happiness. Sadly, Sera harboured a secret that will threaten their relationship and poor Kikuchi, being Sera's good friend, knew about it. As a result, he is caught in between. It didn't help that Kikuchi's falling for his student too…