The Summer Hikaru Died, Vol. 4While Hikaru is not the Hikaru he once knew, Yoshiki must admit that this new entity has become a friend in his own right. But his true identity remains a mysteryeven to the impostor himself! When their research into the towns history brings them to the library, the boys discover an unsettling clue about the mysterious happenings in the region. Though, the question still stands of what Hikaru and the Nounuki sama mentioned in Hikarus note might beand