Is the MC a little kid, covering his eyes when the circus dude was swallowing the sword? Locking himself up for days due to the death of a practical stranger already felt like a stretch under those circumstances (he's lived in the isekai for not a long time yet and serving the suspicious lord he ought to have plenty of more urgent worries), but he could be a highly sensitive person, so I'm willing to overlook it. But I'm not willing to overlook his otherwise too maidenly behavior.