Hello. It's my first time sharing a game translation, so I hope it's good enough.
Simply extract and copy the files to the "Game" folder and it should work.
I've done a few extra playthroughs to check for bugs and proofread everything, but if there's still anything that I ended up missing, please let me know.
==Gameplay info==
Here's some extra gameplay info from that scenario writer posted in their Ci-en page, and some stuff I learned on my own.
The heroine likability gauge increases by talking to her, so be sure to use the "Talk" command during the naughty play. Using a perfume will help increase the rate that her likability increases when talking to her.
The guilt bar mostly decreases by getting the heroine to call her boyfriend during naughty play, but it'll also naturally decrease over time as you do more lewd stuff with her. There's no special reward, or any "ending" available after getting her guilt all the way down to 0, so there's no need to try too hard to reduce it all the way down.
During naughty play, if you wait until the "Ejaculate" option changes color, then have the heroine call her boyfriend, you'll ejaculate midway through their conversation. Similarly, if you get her to make a call while she's close to climaxing, she'll orgasm while on the call.
The heroine isn't able to cum during the "Handjob" naughty play, so if you manage to get her pleasure gauge to max, she'll start begging for your dick.
Every five days, in the morning, there'll be an event in which the heroine's boyfriend talks to her during school. There's a hidden "Doubt" value, which increases by calling the heroine while she's on a date with her boyfriend on the way back from school, or by having her call him during naughty play.
The heroine's and boyfriend's reaction will change depending on her lewd level and the hidden doubt value. If the heroine sleeps over at the protagonist's home before the next day in which the event would play (that is day 4, 9, 14, etc), then the event will be skipped, so avoid calling her or just send her back home before the day ends if you don't want that to happen.
There's a bug/feature, in which you can sleep until evening before calling the heroine, and the time will get stuck at 17:30, which can allow you to hear all the heroine's voice lines at your own leisure without having to hurry. The only issue is that her status won't change, and you won't be able to ejaculate either, as the game is technically paused.
Going back to the room, or just hitting the pause button and resuming the game will cause the game to go back to normal, so feel free to use this trick at your own leisure.
==Missing/Cut Content==
While translating the game, I've run into quite a few lines that didn't make it into the final version, involving the protagonist interrupting the heroine while on a date with her boyfriend, and even the option of bringing the heroine to a love hotel.
It's a bit weird how the game only has weekdays and no holiday events, so I believe originally an option to "Go out" would be available during the weekend, in which you could wander around and bump into the heroine on a date, but it ended up not making it to the final version for whatever reason.
It's quite a pity, as there's even some lines from the heroine calling her boyfriend dick small before leaving with the protagonist, and I'd also have really loved the opportunity to take her to a love hotel and overwrite her first experience with her boyfriend.
The scenario writer mentioned in his Ci-en page how he's just a subcontractor, so if anyone would like to see the whole thing implemented in the future, or even some extra DLC adding the extra missing content, then the only hope is to buy the game and leave a review in the game's DLsite page.
==Personal Ideas==
If anyone is willing to buy the game and help leaving a review, here's some content I'd like to see besides the stuff that's already available/planned in the game files:
-Option to strip Chiho down to her underwear before getting naked, with multiple underwear options available
-Chiho will masturbate at home/school if the day ends with a max pleasure gauge
-Chiho will start moving on her own during sex if you don't do anything
-Chiho will call the player herself asking if she can come over, or just to hear his voice before falling asleep or during masturbation
-Chiho sends erotic selfies
-Lick/blowjob during titfuck
-Drunk sex (buying beer or going out for a drink like in the intro)
-Sleeping sex (fucking Chiho from behind while she lays on her stomach, fast asleep)
-Wake up sex (Chiho will wake you up the next day with a Titfuck/Sixty-nine/Cowgirl)
-Anal option when fucking from behind and during cowgirl position
-Unique dialogue when licking/sucking penis after doing anal
-Heroine teasing/fingering player asshole during blowjob
-Armpit fuck (the heroine's armpits look quite sexy *drools*)
-Sex toys, rotors, vibe, anal beads, anal plug
-Sexy see-through lingerie
-Cow costume
If there's any future update or DLC adding extra content, I'll be more than happy to translate it as well, so hopefully the game gets more sales and we can get to enjoy an even better sexy time with this lewd big breasted heroine.
==Extra Note==
Just in case anyone ends up asking for it, I added some extra save files, with the first one containing a lot of extra money that should be more than enough for buying whatever you want right away, and the second one having everything unlocked, with only the guilt gauge still not completely drained.
The game has some issues recognizing save files that have been copied in, so just make sure to have a save file present in slots 3 and 4 before overwriting them, and it should work.
If you want to mess around with your own save files, just use RPGMakerSaveEdit, go to the "Advanced" tab, and enable "Edit Switches and Variables". I've translated most of the stuff that has any gameplay relevance, but I couldn't be bothered finishing the rest.
If anyone wants to go through that extra mile, then feel free to change the System JSON file under Game > www > data.
Hope you enjoy the game.