Re: Defender of Public Morals: Swordswoman Asagi (Ahriman) 風紀剣士アサギ
Here's a breakdown of the final battle and some background info that no one asked for

I noticed a mention of "hidden beneath leaves" and and an individual named "Akusuke" several times during the cutscene that takes place after the final battle. I got some throrough explanations from Ahriman and I'll share them here because they're pretty interesting and give a clearer understanding of the plot.
First things first, Akusuke is the demon boss, the self proclaimed "God of Pleasure/Desire". He, like Asagi, once followed the path of Public Morals and was a superb Public Morals Swordsman. However his own desire and libido grew and grew until his death. He was angered to find out that his sword (Hagakure, the same one Asagi uses) manipulates the user's personality (as well as other's it is used on, more on that later). His desire to attone for his oppresion, along with him being consumed by anger and unfulfilled lust, made his spirit became demonic, (and I think it's safe to say) Godlike/Devillike. His eyes were opened, sexual desires shouldn't be hidden or punished, they should be openly enjoyed and savored! All of this culminated in his desire to create a world filled with lust and openness to one's sexual desires, a "Pleasure Heaven". He has a distinct hate for the Public Morals Philosophy, as well as Hagakure (The wooden blade Asagi wields).
Hagakure translates to roughly "hidden under leaves" and is one of the scriptures from Bushido, the Japanese Way of the Warrior. In this context it serves as a reference to Bushido. The philosophy of Bushido , in case you're wondering, or the Way of the Warrior is to find a way to die. When choosing between life and death, a (warrior/samurai) must always choose death. If a warrior fails their goals and chooses life, they must be seen as a coward. If they fail their goals and choose death (suicide) they are seen as dying a dog's death. This is considered more honorable than the former, however. Basically Hagakure deals with choosing selfishness or honor when deciding to live or die (for one's master). The "hidden under leaves" meaning represented the end of the Bushido philosophy/lifestyle similar to how summer ends under the leaves of fall.
Back on topic. Hagakure has the power to cast out selfishness and sexual desire when it strikes someone. According to Akusuke, it "manipulates the wielder's personality", presumably similar to how a cursed/demonic blade would change the user's personality into one filled desires of violence/bloodlust. This change causes the user (Asagi in this case) to have a seemingly unbreakable will and resistance to pleasure or at least the resistance of becoming completely corrupted. This is shown just after the first phase of the fight against Akusuke, where he "defeats" the heroines and forces them to succumb to his "Hell of Pleasure/Pleasure Hell" assault where they are ravished thoroughly by tentacles in all of their weak spots. Asagi was able to resist complete submission by chanting the name of the sword, becoming "nothing/empty", and focusing her will on the Public Morals philosophy. This allowed her to free herself, attack Akusuke (temporarily incapacitating him) and free her friends, who were almost completely tamed by the overwhelming pleasure. There is a catch to the sword's abilities, that I've theorized to make sense at least. The sword can only manipulate the user if it is being used by them or in other words being held by them. In theory without direct contact to the user, their will will only be as strong as a normal person's. So when Asagi is defeated by Akusuke in the bad ending it would make sense that she would be disarmed before being completely tamed and/or brainwashed.
When Akusuke is defeated he laments at being unable to create his "Pleasure Heaven", and atone for his oppression as a Public Morals Swordsman. Asagi feels pity for him and considers that maybe Public Morals isn't the only way of life. (Note that in other areas in this world, Ahriman's world that is, sex is openly enjoyed. This is another part of Asagi's pilgrimage, to "bring people to their senses" so to speak.) Asagi however sticks to her resolve, as her will and belief in Public Morals has been strengthened throughout her journey, and she has grown greatly as a result.
But in master Ahriman's words, her growth isn't really the most important thing, because he prefers seeing strong-willed heroines surrender to pleasure.
(*Weaknesses
Asagi - Masochist (She also seems to enjoy particularly enjoy sucking dick, her early capture scenes have her submissively and obediently giving head to her captor. She even gets complimented by the enemies each time, so maybe that's one of "special skills".
Whip - Anal Masochist (Made very clear throughout the meat of the game)
Ura - Kissing, implied masochist as well (When the three brother's did their triple licking technique to find which erogenous zone she was weakest to, I believe they concluded she was noticbly weak from tongue kissing. Also note that her some of most submissive scenes have her tongue kissing her captor, like during one of Prince Black's porn shoots.)
Blade - Her own ego/ she has a thing for Prince Black, possibly a thing for being filled with cum/ creampies too. Notice how she completely surrendered to Prince Black after being sexually trained and filled to the brim with his cum. When rescuing her from Akusuke's realm and her deepest fantasy is revealed, she starts off dominating Prince Black but eventually is dominated by him and filled up with cum until the point where her womb is bulging. So basically "creampies" and "Prince Black".)