I'm going insane trying to remember what the title is:
In the first chapter it was a guy who was originally from a Hi-Tech future fighting aliens? He then blows up everything with himself since all his comrades died and then found himself reincarnated into a fantasy world as like a 15/16 yo lord (blond haired). Then typical fantasy male lead stuff happens.
What I liked was that it was not setup for him to take over the country or something like that - it was getting sort of interesting where he meets like a Prince / heir to throne on the way while negotiating to get water from a lake from where I left off.
I read Bad Apple before this so I was quite surprised to see Uno lol. Honestly I feel like his character is a lot better in this one but he's younger than most of the cast so it's all making sense why he's more of an asshole in Bad Apple
Cute story but I just try to ignore some of the spy aspects because it was a little nonsensical in this one (it seems much more well done in Bad Apple)