Some warnings for those who want to try the game.
-The translation is very bad. There are many grammatical errors, such as using "she, her" when addressing men.
-The more the game repeats, the more boring it gets. Because there is no feature like fast skip.
-If you save the game after viewing a phone message, it does not save the message history. When you do load, the message history returns to its previous state as if it never happened.
-You need to guess where the girls are and go there to increase your affection with them. If you go to the wrong place, time is wasted and the day is completely wasted. (so you need to do save scum sometimes)
-Game have day limit. You can do 2 action every day and after 30 day, game is ending. So if you do not like the games limiting your actions, this is not for you.
Overall concept not that bad, but still it is giving feelings like early alpha version or something.
Translation is indeed terrible, and even names are wrong when talking about the blonde or the boyfriend. If you save in day 1 you'll go through the tutorial all over again. If you load a day save it's slow because it shows the whole day change screen. Only night saves are instant loads.
However, you don't need to guess where the girls are, for the most part. If you care about H scenes, the focus early on should be going to computer class to max your hacking to get all their secret media accounts (you need to visit their room when they're away in class or the cloth shop, then you can hack the phone)
Aside of the obvious group chat when they want to meet together, they will usually post in social media or receive sms from other guys when they are gonna fuck or masturbate in that timeslot. They mention the place as well.
Some are also indirect messages, like blonde complaining that she can hear the other girl masturbating in her room. (so you know blonde is in her own room and the brown-haired girl is having her H scene next door)
Even if you want only the Netori approach, you have to stalk their posts in every timeslot to meet them for sure and to decide which girls to avoid at that time. That said, you will need a lot of savescumming if you want to do a mostly perfect playthrough. Not that you need it, 31 days might feel like not enough, but it's actually plenty of time to max their love if you skip ntr scenes and instead use those timeslots to further pursue other girls.
how the hell do you pass the hacker school class???
Read my post in the last page if you want the passwords. The hacking minigame is about reading all the clues (click on them), then use basic logic to deduce the password and click on the letters in the onscreen keyboard before time runs out. Avoid messing up because the Delete button makes you start all over rather than delete the last input.