Board Thread:Theories and Speculation/@comment-23828628-20160803031754/@comment-25888872-20180818232021

I don't know if the death of a dear person is mandatory for it... a way more intense pain than the one that awakened the sharingan would be required, and until now it used to be the death of a close person.

I'm calling it now, Sarada's Mangekyou Sharingan will awake upon the pain of seeing Boruto and Sumire kissing.