Can someone please spoil me if there will be real and proper romance developments between the MC and his harem? And no, girls waking in the middle of the night to touch the sleeping MC doesn't count.
I feel like the story is going too fast, in the span of 4-5 days since he reincarnated the MC already did stuff that people would take years or even an entire lifetime to do. The interval between each boss fight is almost non-existent and the story is introducing too many girls at once and isn't giving them enough focus for us to get attached and neither developing the romance between them and the MC.
Unfortunately, you wont even see it as for the light novel. Its kinda tricky since Toowa is more focused on the fights and plot progression. I mean, more on the Labyrinth Country they've reincarnated in and the mystery about it (like the Hidden Gods). There's occasional comedy and like what you said about " walking in the middle of the night" scenes but romance development is kinda so-so. There's also a scene on Suzuna and Kyouka respectively as i remember but not that kinda development that you could call but more of a step forward i guess.
Just remember always the goal of Arihito:
1. Going to the 4th District to make Theresia human again
2. Rescue Elitia's best friend on the Simian Lord in the 5th District labyrinth.
Overall, its not a romance focused story as you see it.
Once the current fight ends maybe rikizo will change most of the scenes that happened in the novel (it already is on the current chapter with minor changes). there would be another 2 arcs that would happen after the fight as per volume 2 of the LN where it is adapted and maybe would continue to volume 7