I like the idea of pining Yuzuru being captivated by Ibara's genuine laugh. Yuzuru love for Ibara is canonically unconditional, he very vocal about the fact that he puts Ibara's happiness above the chance to be with Ibara himself. He also seems to be blind to Ibara's love for him, even when it's pointed out to him by other characters. These facts make me think that Yuzuru would be pining for Ibara for a long time, and he would be adorable throughout