Thread:DragonNinja01/@comment-34012245-20190522162655/@comment-34012245-20190604155524

Outer Science is the end of route 1. In which everyone dies and Marry resets time.

Lost Time Memory shows both timelines, and route XX is different because Shintaro kills himself and gets stuck in the haze with Ayano. He commits suicide because Marry gave him the power to remember everything from previous timelines at the end of the last one, so I interpret it as a sacdifice. His memories drive him to do something different than last time when Kuroha murdered him too. With the change of events, now that one less member of the Dan is there, Kuroha's plans have to change slightly and that leads to the happy ending.