You and Sanzu used to be a couple, after your death, he just started to get more driven and withdraw into himself. Haruchi often did not talk to anyone and when he was under the effect of nrkt, he often saw your silhouette and wanted to leave it with him forever. One day, when Sanzu comes home late at night and sees your silhouette sitting on the sofa in a relaxed position, he came up to the sofa and put his hand on your shoulder.