Started reading this manga after being pleasantly surprised at how good its anime was...it's a bit impressive how much worse the manga is. So many of the touches that elevated the anime adaptation are lacking here, like how the show spent almost its whole first episode establishing the MC's cred as an assassin in his original life, or the bizarre naked kata inspections set to ominous cello music, or how there was a date episode for the MC and Dia before he gets told he needs to "assassinate" her so the moment has more impact. Everyone in the manga comes across as more vapid and nonthreatening than in the anime, and the character designs and art in general is much worse.
Since a S2 is apparently supposed to air at some point I think I'm just going to watch that instead of reading more of the manga.