you know, stopping to think about it, with all the magic tools he's made, how quickly and easily both the lord and the king discovered he was the one behind the toilets, how he knew the other kingdom was after him, trying every single "legitimate/legal" method to get to him, the king mentioned he's doing everything to keep him under wraps, and all that jazz, it's honestly impressive how no one thought it'd be the obvious next step to beef up the house with barrier and detection magic tools, that would stop people with malicious intent from coming in. Not like the invaders would be able to nullify it seeing as they can't decipher his formulas no matter what since it's all in JP.
Great to see this one is back though, all the missing chapters are here and you're even continuing from where the last group stopped. Thank you for the great work, hope you keep it up