i think you're being really harsh? it doesn't seem like she just forgot organically. it seems to be heavily hinted at that she forgot due to some currently unknown phenomenonUrarararas disappear from graduation books. True nature of the gods isn't allowed to be divined. What could it mean ... obviously it can only mean one thing.
Anyway, shitty thing to do. You are close enough to your friend that they'd entrust their daughter to you and when you slowly start to forget everything about her instead of doing anything about it you just proceed with the forgetting ... ? Nevermind Chiya, she should apologize to her friend. ^^
Well, yes, obviously, but she knows she's forgetting, and then she's not doing anything.i think you're being really harsh? it doesn't seem like she just forgot organically. it seems to be heavily hinted at that she forgot due to some currently unknown phenomenon