He becomes THE interesting person for OMOSHIROI handsome Prince and other older men!
But goddamn, I love this series. Beautiful (but kinda hard to follow at times) art aside, the whole idea and execution are brilliant. MC has the knowledge and some abilities to carry out his ideas (mainly due to his family being wealthy) but he quickly tries things outside of the game. He wants to change as much as possible but is careful with it and instantly recognises the possibility of "game correcting forces". He trains and gets useful skill with his spear but it's nothing outstanding - it just feels rightfully earned. Even his "tradition defying" tactics on ganging up on demons only worked because the ones who used it first were mercenaries and soldiers employed by MC and his family. Rest of the army were forced to use it only because the "simple monster attack" turned into stampede.
Same with all the relationships he has. You can see that he truly befriended Mazel, that he gained the recognition of soldiers at the battlefield, that his bold tactics were what allowed him to talk to Crown Prince. Said Prince also didn't instantly jump on his dick, he delegated the role to MC since he seemed to have a solid enough plan to guarantee the safety of his son, important people and the army. Even after the fight it's not that he completely trusts him, but is eager to give MC a chance to prove himself and even considers "grooming" him into important position for his own son in the future. Like the only character that seemed a little to eager to trust MC is the thief<?> that got paid upfront and thus could hire a doctor to save people important to him.
Gotta love how MCs super cheat OP ability is truly just planning for the future by using all the means available to him at every moment. That he just doesn't go into a secret dungeon to pull out a cheat equipment. That he has to delegate a whole friggin' merchant caravan, hire the mercenaries to protect it and even then he isn't sure that he will get what he needs. Also this chapter and the magic - it's not like MC discovered something super secret or unique. As the teacher said - the "area magic drain" was noticed before, the potential uses and modifications to potions were already studied, like they would if they existed in the real world. They probably just need a push from MC, who has his broader perspective as isekai-man, but there is quite a big possibility that they would arrive at the new discoveries sooner or later due to the war and simple advancements in the science.
tl'dr:
The series is fucking awesome and I missed it so much!