I think I agree with those comments that prefered the ghost mimori. He was so carefree, sweet and kind, and his backstory, especially the stamp thing, made an impression that was a bit far from this sequel's mimori. It does feel like they're two different people, but I guess that's because mimori's thoroughly confused? Like from the moment he woke up he had this sudden urge to feel better faster and had habits that he didn't have before. It's sad how iku decided to stop liking him anymore though :( it must've been hard for him to give up.
SAYAMA'S REACTION TO THE FINGET HEART IS SO ADORABLE MY HEART CAN'T TAKE IT AAAAA
http://www.mangago.zone/read-manga/mask_danshi_wa_koishitakunai_no_ni/uu/d_chapter-11.2/pg-1/
ENEMIES TO LOVERS!!! WE NEED MORE!!