Ok...sure... you may have killed a highschool friend... but if he was with that group, wasn't he also looking to kill you or at least allow them to kill you? So nothing's lost really...
The kid guarding the site seems overpowered as fuck, I guess mc team will be the only one survives. Was it her sister that with the kid guarding the spaceship crash site?
@HerculeSSJ That is more because: The "friend" that got 100 coins was not mentioned before and the "friend" that died was a non important NPC that apeared in the background sometime but never given attention to.
The story is interesting but the lack of curiosity from the MC about his powers is something that aways put me off in these manga.