I don't know why this game's thread has 17 pages, but whatever, quick walkthrough below for virgin and true end routes if you really want to play this.
Small observation: the walktrough gives 12 locations for SAINT'S GOLD COINs - you only need to grab 10 of them.
*Start*
Use the red book at left room, then leave room. Go up stairs, talk to king. Leave castle.
Go to Lorelle village; enter the big house with red roof for an event.
Talk to the guy with a ! baloon for a quest and leave house, then leave village.
Go down to the snowy fields at southwest side, kill monster.
Go back to Lorelle, talk with the guy at the red roof house again to fnish quest and get a SAINT'S GOLD COIN (1) as reward. Leave village.
Go to Roubaix ruins and watch scenes. On first fork go middle, down the stairs; on 2nd fork go right, then follow the path.
See scenes, open all chests, see events, leave. There'll be a boss fight with 4 guys, then you'll be back at the castle. Talk to the king, watch events.
Leave castle, go to Rantes mountainpath, east of the ruins, follow the path. There'll be an event near the end, then leave mountains.
Enter Lantak village (a bit east) and talk to the mayor (leftmost house; he has a ! baloon), ewatch events.
Go to the church at right side of village, go down basement at left side, grab mirror key item. Sleep in the inn, watch events.
Enter inn again, go up to 2nd floor and grab a SAINT'S GOLD COIN (2) at the green shelf; leave Lantak.
Go northwest to the port; talk to captain at left pier then embark to Orianne.
At Orianne, go to the northwest house; there's a SAINT'S GOLD COIN (3) at the right side of it (in a vine, before entering the house itself).
Enter house, go to 3rd floor, watch scenes. Go sleep at inn. Reject the guy for virgin/true end routes.
From this point game becomes sort of open world.
*getting HOLY WATER and HOLY SWORD*
Both are necessary for true end. The sword is also necessary to break the priests' barrier; without it you'll start the boss battles with a fkload of debuffs.
At Orianne pub, get quest with adventurer (has a ! baloon) and accept quest; then leave Orianne.
Go to Krups village, south of Orianne. Enter the only regular house and talk with ! baloon NPC. Grab a SAINT'S GOLD COIN (4) in the right side. Leave house.
Enter the pub, talk to mayor (has a ! baloon), then talk to mayor again, agree to defeat bandits. Leave Krups.
Go north, to bandit's hideout. Kill entrance bandits. On next screen, inside the fort, there's a a SAINT'S GOLD COIN (5) on a barrel at left side.
Enter the caves, follow path, kill bandits. You'll be back at krup, mayor will give you HOLY WATER. Leave Krups.
go north, past the bandits' hideout, enter Orc's den (the mountain). At the screen with the cave entrance, there's a a SAINT'S GOLD COIN (6) at the right side.
Enter the cave and follow path. On 3rd screen there are 3 paths, west, east and northeast; go northeast.
Defeat orcs, go to the sword and pour holy water; you'll get HOLY SWORD. Kill orcs again.
You can now return to Orianne and finish quest with adventurer at the pub for 5k gold; you'll retain the sword anyway.
*Sealing the dimensional rifts*
You need to kill 4 priests in 4 different places for it.
*demon tower Killbahn*
You must pass through Maine forest (northwest of Orianne) to reach this tower. The forest has a few forks, but keep going north and west when possible to reach the end.
Enter tower. Go right all the way, drop in rightmost hole, pull lever down (it can be reactivated; keep it downwards); use stone to teleport back to entrance.
Reenter, up, up, northeast, up all the way, drop in hole. Use stairs on south, keep going the path.
You'll reach a room with a warp. There is also a SAINT'S GOLD COIN (7) on upper left.
Enter teleport, kill priest.
*Mysterious castle*
Go to Wore kingdom (leave Orianne and keep going west). Talk to adventurer on the pub (there's an ! baloon on him) to trigger the location.
Go back to first continent. Castle is south of Lantak city.
Follow the path and kill the priest.
*Fairy Castle*
Follow fairy forest path; only fork is at 2nd screen, go left. Then follow path.
You'll reach castle at the end; on right side of the gate screen, outside the wall, there's a SAINT'S GOLD COIN (8).
Enter castle, follow the path, kill priest.
*DANGEROUS UNDERGROUND CAVERN ARUJANO*
Go to Wore kingdom, enter the castle.
Go left and down to reach saint Orianne's altar; there's a SAINT'S GOLD COIN (9) somewhere there, don't remember where. Go back to first castle screen.
Go north all the way and enter the room where king is having a meeting, watch events.
You'll be at Live's front door after that; enter and talk to him. Leave Wore and go back to Krups (south of Orianne).
When leaving Wore, and passing the mountains, make a detour south for a lone house; enter and grab a SAINT'S GOLD COIN (10) near the river, in a fish box. Leave and resume going to Krups.
Talk to Live there, then leave Krups and go south to the swamp, where a new location will be opened.
Enter the cave, follow path, kill priest.
*Finale, part 1*
Go north of Wore kingdom for a new location, Loft's house, watch scenes. There's a SAINT'S GOLD COIN (11) next to the horses.
Enter the house, talk to Loft, leave location.
You'll watch an event immediatly leaving the location, then will be back at Orianne port. Talk to sailor to go to final dungeon, Dimensional Cave.
Follow the path (it seems to fork a lot but all paths lead to the single exit) then fight boss at the end. Enter distortion, watch events.
You'll be back at Orianne. Enter Ganesh house, talk to the maid with ! baloon, watch events.
You'll be back at the inn. This is the point where pregnancy becomes possible.
*Virgin End*
If you never lost boss battles and refused the guy when I warned you the first time, go for virgin end now. Go south to the port, talk to sailor again, enter Dimensional Cave. Follow path again, watch scenes at the end, fight boss, keep going, watch more scenes, final boss. Kill him, refuse sex with guy at epilogue, THE END.
*True end*
Talk to luis/lewis (your childhood friend), choose talk (instead putting him on party; the 3rd option "I'm worried about Luis/Lewis"). At the room agree to fk with him. Leave Orianne.
Go to the birth site (lone house northwest of Orianne), talk to doctor, give birth, grab your true saint daughter at first try (the thing which never been born during the last millenium, mind you).
Go back to Wore village and talk with Live's son (with a ! baloon). A new location will be opened south of Krups. Enter the Strange Ruins.
Keep going north and west to reach the end (I think ther's a fork somewhere along the way). When you reach a pyramid-like altar go around it through the left side. Behind the altar there'll be a SAINT'S GOLD COIN (12) in the vegetation, north of it.
Enter teleport at the altar, kill boss, grab SAINT'S KEY.
Go back to Roubaix ruins, go all the way down where you opened the chests at the start of the game. Open door with SAINT'S KEY. On the altars, put the SAINT'S GOLD COINs (10 needed, as warned at the very start of the walkthrough), HOLY WATER and HOLY SWORD. enter the sealed room, pillage the chests, interact with coffin, watch scenes.
Go back to Orianne.
Go south to the port, talk to sailor again, enter Dimensional Cave. Follow path again, watch scenes at the end, fight boss, keep going, watch more scenes, final boss. Kill him, watch scenes, choice here is irrelevant, THE END.
*Extra for the "plot"*
Spoilers. obviously. Not that I think you're playing this for the plot. In case you are, this is the story, so you can save time.
1k years ago Loft the bad demon king killed a gajillion of people using demon hordes, Saint Orianne got pissed and sealed him.
Cistina went to explore the ruins with the two guys and unsealed Loft; they start quest for repentance. they grab a mirror at Lantak village and when sleeping at the inn cistina has a dream about two people, Fin and Karen, where they split up at bad terms.
Gameplay, gameplay, gameplay, Live is an asshole, Loft is an asshole, Ganesh is an asshole, basically everyone is an asshole.
You go killing priests, see Live being an asshole with Loft at Loft's house, and I have no idea where this "Loft's friend" came from, but he's there, he's also an asshole.
You kill all priests, attack Loft at his dimensional fort, Live kills Loft's friend (the random guy mentioned above), then Loft crushes Live and leaves him tetraplegic. This game has a thing with breaking necks as you'll see soon.
With Live, which is actually a lv 99 high stats badass (although an asshole) out of picture, Ganesh start bitching about how cistina must start mass fucketry with every cockholder in the planet to give birth to the true saint, the only thing strong enough to stop Loft now.
*Virgin route* - Of course, nothing that can't be solved with level grinding and equip farming. Loft is killed, and Cistina go in a journey to know the truth about the past of Loft - she still thinks something is amiss.
*true route* - She lays with Luis/Lewis finally, gets pregnant and, lo and behold, the instant birth is the true saint. Then she does all that gameplay crap I mentioned in the walkthrough, grabs the saint key, opens the sealed room in roubaix ruins, and finds Saint Orianne's coffin. Her daughter grabs all the original saint memories. Then they proceed to fight Loft as usual.
At the end of the battle the daughter reveals how the Wore king at the time framed Loft/Fin for all the gajillion deaths - sending him out of city, then summoning fuckloads of demons to slay opposition and the usual tyrant procedures, then blaming the demon boy. In the meantime he also forced the first saint to swallow every rod in the kingdom to spread genetics. Karen Orianne, the saint, noticed everything went south, then sealed Loft instead killing him, and dropped the chest on which he was sealed with along the other chests at the bottom of roubaix ruins. Then she proceeds to seals herself in the next chamber and commits suicide.
Then usual bullshit ensues, Loft has his "demon essence" removed from him by Cistina's daughter, then he gives them a hellfruit (which can somehow cure Live's assholey ass) and resumes living as human.
Then, at the epilogue, your other party member (Luis/Lewis friend, forgot the name) suggests an orgy because plot. Cistina can either punch him and credits roll, or can oblige, and Luis/Lewis agrees since he can finally fuck his own daughter during it, look at this shit ma boys.
Wore kingdom goes into a crsis, king abdicates, asshole Live is new king somehow. Cistina and Luis/Lewis marry, world goes on.
And no one noticed if Karen had locked Loft's chest with her in the sealed chamber of the ruins none of this shit would have happened.
True end: Karen Orianne is truly a bitch.