Koichi question about childhood friends dug up old memories from Kaname; from when Koichi was a volunteer teacher at Kaname's kindergarten and his first love rival.
Whose fault is it I caught this cold?
¿Quién es el culpable de 
que agarrara este resfriado?
¿Quién es el culpable de 
que cogiera este resfriado?
Peguei este resfriado por culpa de quem, hein?