This is a good game, I'm enjoying it, and don't mind grindy games, as long as the reward is worth the grind. The story is good, the graphics are great, and the characters are fun.
My biggest issues are as follows:
* The hint system needs an improvement, as it tells me there's no more events, even though I might still have 10 events not found, and finding them is near impossible without the hints, so I end up skipping the remaining events in that chapter, which is a shame, simply because there's not enough active content remaining, to keep me interested enough to find the last few. So this is a balance issue more than anything, as those last few events seem to be too difficult compared to the rest - eg. you get events 10, 20, 30, 40, in quick succession at the start of the chapter, then mid-way through the chapter you get 50......60......70....., then at the end of the chapter, when you think you're finally about done, you get 80................................................................................................................90, etc. This massive gap in events, and lack of hints, can also lead to wondering if the GUI is bugged, or the events are bugged, causing me to oft check the decompiled data, which is just a silly thing to need to do, especially difficult for first-time players.
* Next would be that the 'skip seen dialogue' feature is missing in the later chapters, and this feature is essential in this type of game, to prevent boredom from repetitive event grind, as it's still a grind with skip enabled, but also to prevent actual physical injury in the form of Repetitive Strain Injury.
* I noticed the arousal stat didn't seem to be really a functional mechanic in the early chapters, and only really came into play in the last part. This is confusing, so needs to be throughout (as painful as that is to retroactively do), or not at all. Considering the grind already, this can make the game considerably harder, considerably increasing the amount of repetitions, especially as it comes about without much fanfare, and event progression can be locked behind it.
* Money. I understand why it is there, but the system needs a rebalance, so we're not paying $3k for a dick kiss. The MC is essentially burying himself in a hole he won't be able to sustain, as he's training the girls to be paid massive dollars to receive pleasure from the MC, instead of give it. The money should be a bypass for giving the girl's physical attention, like when you're lacking arousal; not a requirement on top. No one in their right mind would train someone that way. If arousal is high, and the girl is getting pleasured, then that should negate the payment, and payments should all be, at most, in the hundreds of dollars for maybe actual sex, not thousands of dollars for a kiss. There needs to be logical incentive for the girl to do more; if she's only getting $5 for a kiss, then maybe she'll push herself to do more, even if she doesn't want to, because she really likes the money. However, what are they spending it on, because the MC is buying their clothes and such. Giving them too much money would give them too much freedom and zero incentive to do stuff. This needs a logical overall, as well as interface overhaull. For starters, we shouldnt need to enter the value every time, if the incentive amount hasn't changed, and some simple preset buttons would be far more user friendly, as would automatic bank deduction, as who uses cash these days?
* The biggest issue, overall, would be that the grind is a little menacing, and will result in most people using cheats. I am using cheats myself, and even so, the grind is still massive. However, the cheats I use are for specific reasons, that are mostly annoyances. First, the money management is annoying, as we're constantly depositing and withdrawing money manually, through a terrible GUI, which is frustrating, so even if I have the money in the bank, it's easier to cheat, and ignore the banking mechanic, as it saves unnecessary clicking, and going back to the bedroom, adding to the grind duration. It's just unnecessary annoyance, especially considering the costs of the girls and how frequent we need big sums of cash. The second cheat, is for the already mentioned arousal system, which just piles on grind on top of the multiple grinds we have already, with the repeating events, and money earning system.
* The camera system is fairly inconsistent, sometimes when I think it will be there, it isn't, and sometimes when it shouldn't be there, it is. The icon is too hard to see, as it's dark and tucked away; considering it's a core mechanic, maybe there should be a camera overlay for the entire screen, when there's an active camera, as though you're looking through the view finder, but nothing that blocks the view; just so we know it's camera time.
* Studying, well, it's there to slow the game down, but the game is already very slow, without additional invisible study slowing down the game. It's not integrated into the story at all, the MC's bedroom isn't even the main exit point for events (The hallway is); this goes back to the annoyance of fund management; study is in the same category there. Study needs to be integrated to boost stats, like hacking, massage, etc are. Make it a continuous thing, beyond simply 'study', make it an integral part of stat boosting, allow us to use it to study business to increase profits, or study manipulation to reduce costs. This massively helps the player remember to do it (It would help to have stats displayed at all times). There are many other ways to add something like this, but first and foremost, make the MC's bedroom, the central location, the hallway is entirely unnecessary additional clicks, and reducing clicks is important for health and enjoyment.