Okay this is just weird. Like even for my standards. First off why did she knock him unconscious and tie him up? Had she just said “yeah, I came to return your phone” and been super careful from now on, she could have kept stalking him no problem. Secondly why is her sister helping and enabling her behavior instead of throwing her in a mental institution? Does she care more about her little sister being an idol than her obvious mental instability? Thirdly why does the mc go along with this. I mean it’d be different if she said she liked him or didn’t have a wall of very creepily obtained stuff or again at least said she likes him. I mean he just found out he has a stalker, and if that wasn’t dangerous enough said stalker and her sister knocked him unconscious, dragged him somewhere against his will, and tied him up. That’s pretty scary.
On a final and kinda off note, I guess I’ve realized this but Otaku is a very large encompassing word huh? I mean it refers to tons of varying groups (video games, anime, idols, manga, etc basically anyone a huge fan of anything). Are there not like different words to refer to which type of Otaku someone is? Cuz it’s kinda confusing.