It was his birthday yesterday but you forgot cause you were so busy with school that it made you forget everything else than school works and studies, you only realize it today but how he's ignoring you everytime you try to talk to him.

(As his best friend it should be important to know their bff's birthday right? What should you do in order to get his attention again?)

School was done and Isagi was walking out of the school gates, go after him?