Itsuki's life is fulfilling and filled with happiness as he cherishes his relationship with his boyfriend, Airi. Despite this, he worries about the bad terms that Airi and their teacher, Yuichi Shibasaki, share as brothers. Itsuki wishes they could reconcile. However, his world crumbles when he notices Airi's attention wandering to someone else. Now, Itsuki is consumed by the painful emotions of love and confusion. This bittersweet love story follows an apprehensive classmate and his adorable boyfriend.