I haven't complied the game yet (around 7th lvl with girls) but I can't stay silent. Game's good but there are some shortcomings and it's mostly QoL and RPG elements.
First of all fishing system is lackluster. I know it's hentai game but if you've deiced to add fishing you should make it properly or don't make it at all. It's ok to make "Spend time fishing" button and let player get 5 random (depending on fishing stats) fishes. Or you can add something like Stardew Valley's fishing system for example. It's easy to make but more entertaining. And there are tutorials out there (yes, I checked). As I said I know it's hentai game but your players will spend a lot of time fishing, foraging and mining, and maybe doing other things I don't know about. You don't want to make them bored because of that. I could also critique mining but I think you got the point. I don't think there is a way to make foraging more interesting though.
As of QoL... I have no idea why people keep forcing players to use inventory for important equipment or equipment in general. Players can equip pickaxe but why do they have to open inventory for a fishing rod? When they go on fishing spot they obviously want to fish and as far as I know there is no other purpose for this places. So Hero should equip fishing rod automatically. Alternatively you can make a hotbar (quick-access items) on the left where player can see pickaxe though it doesn't make much sense for this type of game. Also is there any way to check my stats (mining, fishing)? I can't find any. Equipment window and/or character sheet would help with that.
This is just a critique. Don't take it as a hate. Overall game is good. Sry for bad English btw.