Now, how to rate this masterpiece! Where to start? First of all, I like 2D graphics a bit more than 3D AVNs. I am always in search of a good 2DCG AVN, and I think this qualifies as a top 3, if not the best. Coming to specifics, there are lots of positives - art style, characters, UI, story plot, choices and their consequences, the MC obviously, the girls, the music and soundtrack, and the quests. I would say I have seen very few places where a realistic portrayal of isekai-ing to another world has been portrayed. The mc is not the chosen one, which is cool, and that's what I like to see.
Well, the grind is quite okay, not too much, but still, I would say try to make it less grindy, like the training of Lily, or offer more rewards to reduce the grindy feeling even less. Also, the fighting monsters quest is highly grindy, and please work on that. Even though I need to earn gold, I can train and get stronger, but that is capped. Seriously, look into it, although it may be how the author wanted it to be. And please, there are no cons. Really, I didn't expect this type of masterpiece when I started the game, though I had expectations seeing the character design of the MC, but not that much. Dev, there are no criticisms, and best of luck to you.