Hatsune probably moved back to her adopted mother,with all the murders happened and Shugo is with his wife there is no need for her to be there.Kyoko did mention her once. Masaki I don't give a shit attitude is weird,nearly all of his family/friends either involved or died and I've never seen him showing anger nor sadness.His interaction with Michiru is the only thing that felt normal,I wouldn't surprise if he tries to kill himself again. Hearing male voice during h-scene is super uncomfortable,I finally relized how fake they were