OK, I am very confused as to how to win fights. The character class for the story being set in stone as Enchanter is shit. How do I expand my mana? And can I win via sex? Can someone please enlighten me?
Enchanter is more for players that better understand the game, funnily enough, since it's useful for early dump stats. Once you get more Bonus Points (from Achievements) it becomes even more powerful.
Story Mode isn't recommended for new players until they have at least defeated Dark Knight once in Adventure Mode. Story Mode is more of a challenge about managing resources and understanding the counter moves to certain patterns. The Story Made uses a 'canon' Hiro, who choose Enchanter because he wants to be like his Mother's trusted companion. It's more linear in narrative with the benefit of more writing & detail, while Adventure Mode is more for newer players & those who want freedom of choice in all aspects.
Mana is expanded by raising your Magic Stat. You can refill your mana easily by harvesting mana crystals from Golems. Mana can be restored with the 'Focus Energy' action.
You can win via sex, in combat only against specific encounters. To find out which of these encounters you can, look to the far right of the middle of the combat screen. You'll find a menu you can open. These are the icons related to sex outcome conditions
Satisfied the opponent using your asshole
Satisfied the opponent using your mouth (This includes 69 and Ouroboros)
Some Satisfied Outcomes will trigger by simply raising their arousal/lust too high
Satisfied the opponent (by making them climax multiple times and raising their arrousal) without being penetrated yourself. This can be done with hand-jobs, penetrating them, stimulating them into climax via arousal moves (this isn't always a flawless tactic, since in all honesty it mostly only happens to Hiro) or using Power Word Cum. Some Domination Outcomes are actually only triggered in specific ways, such as with Mermaid (you have to enter the Cowgirl or Reverse Cowgirl stance with her), or aren't actually in-game (Multiple of the Arena Enemies)
Winnie the Angel is currently the only enemy with a pacifist outcome, this can be gotten by laying on the ground and facing up. She'll sit on your face and the battle will be over.
The knotting outcomes are considered losses on your side, they're triggered by being knotted by enemies with phalluses that can lock in place, also enemies like Arachne & Wasp forcing you into Oviposition. Knotting happens when they penetrate you and raise their erection level high enough.
In terms of winning fights, without sex, you want to have good AGI, PER, END & STR. MAG can help too, but it's not the be-all end-all of winning every fight. Learn the game by practicing against weaker enemies like Brigand, Goblins or Harpies. Move onto the Arena to learn further, in a safe enviorment.
Hope this helps!