Board Thread:Questions and Answers/@comment-28592066-20160606191053/@comment-27347891-20160606192019

To put it simply, drug-induced amnesia- it's something that YandereDev mentioned in a Reddit post, I think. Check the references for Musume's page, I think it's in there.

(I agree that it doesn't make total sense, but I feel as though the current Befriend elimination method isn't exactly polished to begin with.)