User blog comment:TUSF/Light Novel Chronology/@comment-213.8.129.134-20140105004236/@comment-213.8.129.134-20140105012227

In 17 they are already standing inside the house, and since 16.6 is a direct sequel to "the day before" it means 17 is after 16.6.

ME6 is when they already have the house so it is after 17