a well done guide, Ruan
the map sequence, or Offensive sequence, goes like this
1. 侵略 Invade. you invade human territories, fight em, and take over the town. if you lose the battle here, your pawn won't die, they will just retreat. if you lose the 1st fight, your next fight continues with the enemy HP depleted
2.敵を挑戦 Challenge enemy. you send a challenge letter, in your next defense sequence, your enemy will be sending stronger troops
3.お宝の噂を流す Leak treasure information. many weak adventurers will attack you in your next defense sequence
4.情報収集 Information gathering. you'll learn each heroine's weakness
5.調教:xxxx Train:heroine name. Have not tried, but this basically is raping the heroine. I guess u gotta rape several times to get them into your party. of course, you have to capture the girls first.
6.お楽しみ:xxxxx H scene. with the girls who won't resist, I guess.
7.xxxxx強化 Power up a race of your pawn, or your 'max population'. costs bone
8.何もしない Do nothing
There's also an option that costed me 1500 gold, to create more territories in your dungeon.
as for other walkthrough information:
1. in your defense sequence, you gotta build magic circle to farm magic, boneyard to farm bone, treasure room to farm gold. you should understand which one is which by looking at the shape. the other 3 (supposedly 4 but I've not unlocked the 4th one) buildings serve to unlock new soldiers. if you build 2 barracks, you can summon a monster 2 stages stronger than your first one (orc -> bugbear -> ogre, zombies -> ghost -> spectre, imp -> gargoyle -> arakumo)
2. how to capture the girls: simply defeat them in a room with their weakness in it. after the battle u'll rape the girl. note: you don't need to fill the whole room with imps to capture olivia. 1 imp and 4 orcs can do.
3. the girls weakness. Julian -> bug type, but I dunno what this is. the other 3 I know of sourced from 2ch: Olivia -> imp, Alwin -> zombie, Reiris -> Orc
4. basically soldier-type monsters (orc and the like) are good to whack soldier type enemies and mediocre to all others. demon type monsters (imp, gargoyle) have high magic defense but are weak to holy attack and physical attack. undeads (zombies, ghost) are strong against thiefs. there might be exceptions, I dunno, have not really confirmed