Ok, first impressions of V0.4 as someone who hasn't seen it before. An HTML game with real porn and no sissification is a massive plus in my book. In terms of content, right now there are 5 main girls which have a few sex scenes (4 kinda cause Kate still is lacking significant content outside of getting a BJ if you are good at swimming), and 4 side girls with at least 2 sex scenes. Corruption is a plus, the mention of pregnancy content is a huge plus, and there seem to be more fetishes on the way (Pregnancy and BDSM are mentioned in game, but there isn't content for it yet).
As for the gameplay loop, it isn't super complicated, but it is on the tedious side. Class, socialize with girls, train stats, homework if you got it, raise girl corruption, rinse and repeat. The map layout isn't super intuitive, so the shortcuts on the left side help. As for the grind, it isn't super tedious, it is just very repetitive and that is where the tedium comes from. There are no mini-games, thankfully, but you often need to grind a girl's corruption/trust or your int/strength for several in game days. The in game systems are not fully explained, for example, homework has varying difficulty, and you would think your intelligence stat would have something to do with it, but not only is the difficulty random, but your int seems to have no effect on it. Strength seemingly serves no purpose other than for one scene with Kate (if you can swim or not) and Jade (if you are strong she flashes you in the gym before her pants rip). So it seems your character stats are solely for triggering scenes... and so is a girl's trust... and her corruption. But at the same time you have a dominant/submissive stat, a sex experience stat, and a porn addiction stat. The sex experience stat seems to be related to impressing Alice with your sexual prowess, but the other two do seemingly nothing for game progression. Porn addiction only seemed to unlock more genres of porn to view at your desk.
As for how the gameplay flow feels, it isn't intuitive how much a girl's stats need to be increased. For example, your sister goes from being upset with you trying anything, to a complete incestuous slut after about 5 corruption points, yet she gets angry if you try to go into the bathroom before 15 corruption. Meanwhile, the classmates all took about 10-20ish corruption for blowjobs to start being an option. There is a progress tab on the left and it tells you the girls' stats and what to do, but it only tells you vaguely what to do, instructions for buying pants for Jade are fine, but when the instructions are to raise corruption/trust, a definitive threshold of what to raise it to would be nice. Corruption gain should be smoother as well. I was surprised at how quickly I could get the incest scenes, but for the classmates it was a grind. Direction as to what to do is very limited, and a "To Do" tab or improving the progress tab so that it tells you homework and tasks for the girls would be helpful.
As it is right now, the best I can give it is a 5/10 solely for how much video there is. Definitely a lot of room for improvement and the promise of pregnancy has me keeping an eye out.