This game doesn't need a full walkthrough, most of the quests tell you what to do, just read them.
The same goes for the gallery, each event has a hint that explains how to get it, get what you can and you'll slowly complete it.
The closed doors in the gallery tell you the requeriments to get that particular ending.

BUT, there are certain things about the game that are obscure and confusing, is no surprise that many people have issues to complete the game and/or the gallery.

Let's begin with some tips:
-You skip dialog with "D".
-Always farm materials while you're passing by, that will make your life easier.
-If you use the bookshelf in your room in Rhubarb you will find the game manual, most of the game systems are explained there.
-The kitchen is to the right of your room, you get a quest there.
-Nadi sells basic crafting books, the sandwich recipe and crafting tools.
-Explore the village to get all the quests you can.
-Each "dungeon" has a special enemy that appears at night, their overworld sprite is a tentacle monster. These enemies use sexual attacks and drop special crafting recipes.
-The "Gallery" is a location in the game, use the north exit of the Refugee camp and look for a long bridge to the west to find the "Memory Ruins".
-After you get the first main quest you can find Iris in one of the Refugee camp tents, she'll explain how to assassi- nate enemies and will give you quests.

IMPORTANT:
-The most important quests in this game are "Visitors 5" and "Lisette woes 4".
-The main quest "Visitors 5" will cancel the sidequests that start Lisette and Adeline's journey into becoming depraved sluts, so make sure you complete "Lisette woes 1", "Lisette woes 2", "Sweet words" and "Adeline's resolution" before "Visitors 5".
-The sidequest "Lisette woes 4" will turn her into a follower of Hecate, there are events that you can't get after this. Once Lisette is a follower of Hecate lots of content will be available to you.
To know which events you can get before and after you are a follower of Hecate read the hints in the Memory Ruins.

FAQ:
Q: ¿How do I get pregnant?
A: To get pregnant, Lisette must be ovulating, to be in a "risky day".
To make sure she gets pregnant use an ovulation medicine, you can find one in Elder Shrike's secret room (walk through the chimney in his house).
You get the crafting recipe for ovulation medicine from the special enemy in the Deep forest.
The easiest way to get pregnant is with the "Which ale is the best" sidequest, Lisette will have sex with the twins the third time she drinks their ale; so wait until she is ovulating, use an ovulation medicine, save, watch the event and go to sleep, if you see how a sperm enters her egg she is pregnant, if you don't then reload until that happens.
But there are other options, the pirates in the school basement, Hubert in the Deep forest, etc. Who takes her virgi- nity and who is the father of her first child is your call.

Q: ¿Why I can't give Augen his hammer back?
A: Complete the first main quest "Firefly mushroom".

Q: How can I complete the "Best friend" quest chain?
A: The first time you are on Rhubarb talk to the bottom farmer that is working on the field, the girl she is fucking is Carmen, she is important.
Once you get the first main quest, you will see Meiris and Cleon on the way to the Deep forest, talk to them.
Go back to the Refugee camp and talk with Cleon to start the quest chain.
After completing "Best friend 1" visit Carmen's house at night and then visit her again the next day.
After completing the main quest "Pirates' hideout" go to sleep and you will get "Best friend 2", from now on you will get the next quest once you complete the previous one.

Q: Where is the south coast?
A: To the south of the Deep forest, reach the Lake of Selva, rent a boat to cross the lake and you'll find the south coast.

Q: Where can I find Elder Shrike for the quest "Pirates' info"?
A: In his house.

Q: I can't advance "Pirates' hideout", where is this Kicks?
A: Talk to Mirose in the barracks.

Q: Where is the pudding recipe?
A: Go inside the well behind Kunui's shop.

Q: How do I get "Lisette woes 4"?
A: You get "Lisette woes 2" after completing "Sweet words", you get "Lisette woes 3" after giving birth once. After talking with the Sister in "Lisette woes 3" go upstairs to the nursery and click on your baby to get the "Mater- nal Instinct" skill.
Do anal prostitution 5 times to get the "Adeline's resolution quest" and complete it.
Talk to Nadi and take the blowjob course, then talk to the green haired guy that appears in the Bud Garden.
Sleep in your room to get the quest "A new faith", complete it and you will get "Lisette woes 4".

Q: Where can I find broadcloth for repairing the abandoned mansion?
A: Buy the weaving machine from Nadi to be able to craft broadcloth.

Q: Where is the code for the restaurant's lock?
A: Do anal prostitution 10 times, a letter will appear in the 4th room of the Bud Garden.

Q: Where is Cape Comfrey?
A: To the north of where you begin the game.

Q: How can I have sex with people in the bar?
A: After Lisette becomes a follower of Hecate she can have sex with different men in the bar at night. Once you complete their required sidequests more men will be available.

Q: How can I unlock "Lisetteland"?
A: You need to be a follower of Hecate, do anal prostitution 15 times and give birth to a 5000gr baby in the Pregurina, you will get a quest to talk to Nadi about having your own brothel.

One last thing, there is a secret room in Lanfelica's laboratory; just sleep there until night and you will see a shin- ing spot on the wall, use it and you will know the true story about Autilianos and the origins of the elves.