Read the true route,carefully it explains every single mystery (atleast all major ones)
i read this quite a while ago but from what i remember
2034 incident was a plot by the original 'survivors' of the LeMU incident to mainly save everyone especially Takeshi,it was a plan by Yubeiseiharukana and Kid mainly,thats why Tsugumi is so rough in the 2034 version she didnt understand why this was happening all over again etc etc
and money,uh Harukana is pretty rich probably being a successful researcher and all but meh who cares