Ajin, Youjo Senki Recommendations
Personality of protagonist and how he's being thrown into the action due to circumstances, while seeking for safe and comfortable life by (almost) any means, preferring rationality over morality.
Both characters were living somewhat perfect lives, until they were just dealt a bad hand, albeit one could say a well deserved hand, and now they have to adapt to what they were given in order to survive daily.
- Ajin involves a methodically thinking student who is thrown into a world of "terrorism and misunderstandings."
- Youjo Senki involves a methodically thinking office-worker who is thrown into a "magical WW1-esque era."