What a shitty episode!
At first everything ok with the protagonist missing and being a bit obsessive. There was a break from the cliché when he himself realized this and corrected himself by saying that he could not interfere with the girl's work, mainly due to the fact that he had started the relationship less than 24 hours ago.
So far so good, and within what was created in the manga universe. But this shitty episode derails when the protagonist forgets all that and as soon as he enters his girlfriend's workplace he acts out of jealousy, literally getting in the way of getting the job done.
FMC herself also forgets her personality built in previous episodes as someone sensible and brave, and simply blushes like a 15-year-old girl with no experience dating someone older listening to her stories.
As the text is getting longer, I end with the idiocy of having a depressed protagonist looking for a new love, coming from a contemporary world to ours, buying his girlfriend and running away from potential rapists and escaping in a ridiculous way.
But I liked the old man at the end.