Short walkthrough:
Energy - Need this to do everything.
Desire - When performing sexual acts, desire held by you and any partner turns into points which can be spent in the store.
Stress - Affects energy consumption. Lowered by going to church, jerking off, and some events; raised by napping and some events.
It's very overwhelming at first, especially if you only try to be a good servant and just clean, but we're going to bulk up by fighting bears instead.
Day 1 - Cook dinner, clean, bathe, clean more, pass time until the afternoon, nap, clean even more, nap (right now you can only nap in the afternoon and evening, but in a few days you can nap at any time of day). Don't worry about talking to the girls yet, you'll be able to do that as much as you want next week.
Day 2 - Cook dinner, clean, bathe, clean more, visit the church, nap.
Day 3 - Visit the store to trigger Shizuko's event, purchase two of the memory increases from the points shop and travel snacks from the money shop (don't use them yet). Otherwise continue doing your chores. You should have a bit of excess energy that you can use to talk to the girls but it's not necessary.
Day 4 - Visit the store to trigger Shizuko's event, accept the missions, and get ready to start hiking.
On the mountain trail, your priorities are as follows: energy > money > stress > bad choices. You'll figure out which choices are which eventually. Unless you're extremely unlucky, you should be able to get 3-4 max energy increases from your first run. Go back to the store, buy the rest of the travel snacks and enough desire items to raise your desire to 100 minus however many points you have. Jerk off in the toilet, then buy the last two memory increases. Use the travel snacks to keep hiking (don't fill to max as you often gain energy). Then bathe and keep hiking. Then nap, cook, and finish hiking for the day. With your leftover money, buy the pillow, at least one time management upgrade, money upgrades, bubble wrap to lower stress, and some inspirations (I wouldn't use them for hiking unless all of the choices are bad). Cleaning can suffer for a day, you want to pour as much energy into getting more max energy ASAP. Don't forget to go to church.
Day 5 - Unfortunately, Shizuko's next event will trigger the next time you enter the store, which will shut down the store and the mountain trail for the day. So first burn all your energy on the mountain trail again, including bathing and napping, and then enter the store to trigger the event. Any leftover energy should go towards cleaning.
Day 6-7 - You should have more than enough max energy now to keep the house at 90+ cleanliness, cook, and still spend all the rest of your energy on hiking. By the end of day 7, you should have around 400 max energy and 50k money.
Day 8 - Buy out the rest of the store's upgrades and now the world's your oyster. You can keep hiking to get to a comfortable max energy, you shouldn't need that much more. Choose to do "????" in the bathroom to get a cleaning upgrade, "????" in the living room in the morning to get a recipe for thick ramen which all the girls love, and "????" in the kitchen in the evening to get a recipe for Red Wine Beef Stew which is one of the two best recipes.
You should be able to max out every girl's affection and mood easily at this point by talking to them (with Shizuko, exploring will easily max her). You can find the requirements for their events either by mousing over their name on the right, or by opening the notepad on the upper right. The girls' mood can be raised by compliments, keeping the house clean, and cooking their favorite foods; you should keep them at very happy all of the time to trigger their events.
Cooking: The girls never tire of fried rice but it doesn't raise their mood. Repeating any other food on consecutive days will upset them. Otherwise, your choice of food isn't that important, any disliked food just lowers their mood slightly which can be easily fixed.
1200 points will buy you the schedule, which allows you to set the next day. That is a lot of desire points at this point, but you should be able to afford it after a few events, and it's only important when wrapping up the last few events.
Desire: On weeks 2 and 3 you can explore the abandoned hospital (which increases max stamina and desire by a little) and the riverside (which increases max desire). The first time you finish the special quest at the hospital you'll also gain a stress upgrade. At some point use the river autocomplete to increase your max desire to make getting desire points easier.
Increasing max desire will help you afford alternative costumes via the points shop. Each girl has one special costume for 1000 points which unlocks a scene, the other costumes for 500 points are just for their standing pose.
Event unlocking: Info on unlocking all of the events can be found in the notebook.
Shizuko has a special massage scene if you click on her while she is working on her laptop on the floor of her apartment.
Bras:
Kasumi: afternoon - backyard "????"
Ayano: noon - bathroom "????"
Shizuku: evening - corridor "????"
Shizuko: clean at Shizuko's house
The bras greatly increase desire for you (a percent of your max desire as of 1.06) and for the bra's owner, at the cost of 2 actions and a little stress.
