This event happens after you've gone through the church for the happy ending and the two go to the Vatican. From day 30-40 as far as I know, Shanice comes back and after hanging out with her she wants to know where June got such a strong AI from and who her developer is, then you go to some abandoned lab where Jun finds notebook, after that depending on your relationship with her she will run away and you will get the ending or she will just stay