Usually, Elennora's heart couldn't stop beating so fast when he was near the Crown Prince of Wrelloven. True, the heart in a human's body would continue to beat as long as the human was alive, but the pink-haired boy could sense that the beat was abnormal.
His heart didn't beat like that when he was around Bianca, and even when he was frightened when he had to face his mother, his heartbeat was different from what he experienced when he was around Crown Prince Levan.
It was his first time experiencing the phenomenon, so he couldn't even comprehend the meaning behind the rapid heartbeat.
He just kept telling himself that he felt that way because he thought that the Crown Prince was special to him. The Crown Prince was his first friend, and the sensation was indeed new because he had never had any friends before.
Because of that, Elennora thought that his heart would beat fast because he was too excited to have a new friend.