just a simple walkthrough for those who are stucked in the main story...
places names to remember:
ヘリオトロープ - Heliotrope
マナの森 - Forest of Mana
アイリス - Iris
キキョウ - Kikyo
魔族の村 - Monster Village
スノードロップ - Snow Drop
時の神殿 - Temple of Time
[Part 1]
Head east to the Forest of Mana
Proceed all the way to the end and enter the cave.
Return to town
[Part 2]
Return to the castle and speak to Yuri, the lady in red.
Proceed to the north and speak to the guy, Sol
Proceed to the junction before entering the Forest of Mana
Head north from the junction, and west after a signboard indicating 3 locations
Follow the path and you'll reach Iris.
[Part 3]
After the event, head to the manor on the east part of Iris and speak to the maid.
Head west out of the town and enter the circus to find Yuri. Return to the manor and you can enter it now.
Return to the circus and speak to Yuri once again.
[Part 4]
Head south from the circus and west. Follow the path to a cave.
Proceed to the end of the cave and defeat the boss.
Return to Iris.
[Part 5]
The moment you returned to Iris, the town will be filled with monsters from the circus. Defeat all of them and head to the circus.
Return to Heliotrope and report to the princess after the event.
[Part 6]
Remember the part where the signboard indicates 3 locations? Time to head to the north this time.
Follow the path until you reach the next town, Kikyo.
After an event, exit from Kikyo's south exit and follow the path to the monster village.
Try to head back to Kikyo and you'll be caught in a battle.
Return to the monster village and after you're done preparing, talk to the orge lady, Hotaru, to begin the next series of events.
[Part 7]
After a couple of battles in Kikyo, head to the top of the castle.
Defeat the boss and return to Heliotrope for you report to the princess.
For the guide, I highly recommend using @n0demonz map (Can't post links yet so I will just quote and you can go to it:
Just follow n0demonz's map:
Continuing the guide...
[Part 8]
Like Part 6, go North and when you reach an intersection instead of going right to go Kikyo go Left then North.
You will reach another intersection where you will now go Right to Snow Drop. Left will lead you to Pervert Village which is just for side quests, CG, and swimsuit armor.
Continue through the Snowy Forest, you will have a cutscene once you reach the city.
After you've reached the city you will continue North to the Demon Castle. You will talk to a monster by the gate and he'll tell you that the demon lord isn't in the castle.
Return to Snow Drop and you will have a cutscene with the Hero about investigations or something.
[Part 9]
After you've talked to the Hero you will go back to the Snowy Forest, until you've reached the 'zone' you first entered from when you headed for Snowy Drop,
there is an opening to the left that you will follow and continue until you reach a cave.
Upon reaching the cave you will see a CG event with the Demon Lord. Continue through the cave, save her then have cutscene.
[Part 10]
After the cutscene head back to the Demon Castle and go all the way up and fight the Fake Demon Lord boss.
Cutscene.
[Part 11]
After cutscene, teleport back to Heliotrope and save Queen, then head to castle -> castle basement
Proceed through basement, reach and fight the Queen's Advisor.
Cutscenes.
[Part 12]
After cutscene you will be returned to your house, go back to the castle and talk to the Queen.
Queen will give you a knights outfit and Cynthia will tell her that she needs to stop the advisor.
Temple of Time is now open.
[Part 13]
From Heliotrope, head North again similarly to part 6, however before going up the path to reach the intersection to go to Kikyo or the other two areas, go South.
From there just follow path and you will reach the Temple.
Inside the Temple just go North and fight your way through. You will get some cutscene midway and you will continue normally.
As you continue you will finally reach the last boss.
Beat him and you're done!
According to @Welkin endings are:
True End (Sexual Desire & Lewd = 0)
Normal End (Lewd < 80)
Bad End (Sexual Desire = 1000 & Lewd >= 80)
Ruin End (Charm the Queen while in the Temple Of Time)