"Yes, Mistress." - Protagonist
The Submissive Route is one of the routes in Adventure High.
To access it, the Protagonist must anger Cassandra, either by backing Sarah up, or having enslave Julia and have her in Fanatic personality.
During the duel, lose to Cassandra and she'll declare herself the Protagonist's mistress.
Note that this is just a general outline for the route. It is not a walkthrough.
Cassandra's Slave (Corrupt Submissive)
The immediate effects to this is:
Cassandra is always in the second party slot.
If she drops below a certain HP, she will attack the Protagonist until she's healed back up. This increases her affection towards the Protagonist.
There's a multitude of scenes that's exclusive to the submissive route, in which she humiliates the Protagonist in various ways, such as leading the Protagonist through the school on a leash.
If you've enslaved Sarah, you can give her up as long as she's in her Mindless personality and do the library scene, in which Cassandra will walk in on you (note: this scene only triggers if you're Rosa). Otherwise, if you refuse to give up Sarah, you break out of the submissive relationship.
If the Protagonist is Dan, the library scene will not trigger. Instead, the player needs to have Sarah in her normal personality and watch a scene in which she confronts him about being Cassandra's slave. At this point, the Protagonist can enslave Sarah and give her to Cassandra, or agree with Sarah and break out of the relationship. But if Cassandra is has more than 500 Debilitating proficiency, either choice will lead to Cassandra hypnotizing and enslaving Sarah.
Agree to give her up and Sarah is no longer your slave. Sarah will still be a party member, but you can no longer change her personality. If the Protagonist has three or more slaves and have given up Sarah, a scene occurs in the Protagonist's bedroom in which you can agree to give up the rest of your slaves. At the moment, you can only give up one.
If you choose not to give up one, a scene plays out in which Cassandra hypnotizes the Protagonist in order to give up a slave. This leads to the start of the Logical Submissive route, located below.
You can cast Grapple on Cassandra while she is enjoying her new slave to see a short scene where Rosa gets hypnotized into submission by her Mistress' tits.
If the Protagonist has less than three slaves and Cassandra is level twenty or above, another scene plays out, in which Cassandra is bored from Sarah having a lack of a personality.
After Cassandra hits level 15, 17 and 19, there's three more scenes taking place in the Protagonist's living room. The Protagonist must be Dan for all three scenes.
Obtaining the Milk Pumps
On floor thirteen of the dungeon, if the Protagonist is Rosa, it becomes possible to grab the milk pumps in the upper left corner, allowing a scene to play out in the Protagonist's room in which Cassandra is seen milking Rosa, who wakes up and thinks it was a dream at the end of it, disregarding the events that had happened previously. If Cassandra enslaves Sarah, a second scene will occurs where both Rosa and Sarah are milked. Later, in a third scene, Rosa, under the spell of the pumps, is milking Cassandra.
Julia's Slave (Logical Submissive)
After having given up Sarah to Cassandra, if the protagonist at some point owns three slaves, Cassandra will come to your room and order you to give up one of your slaves. Refusing to do so and speaking to Julia in her Normal personality causes Julia to remark that Cassandra hypnotized the Protagonist to do so. Julia tells the Protagonist to meet her in the library in order to figure out a way to escape Cassandra's clutches.
Heading to the library and speaking to Julia causes Julia to shift the hypnosis so the Protagonist now starts serving Julia instead. Julia then orders the Protagonist to go and deal with Cassandra, telling him/her to cast Grapple on her.
After doing so, the Protagonist heads back to the library and Cassandra now becomes Julia's slave. Julia shortly thereafter "releases" Cassandra so she becomes the Protagonist's slave instead. If the Protagonist had given Cassandra any slaves, they become the Protagonist's once more.
Should the Protagonist fix Ashley's mind while being Julia's slave, Julia orders the Protagonist to free her. Ashley, somewhat confused about it, is told that the Protagonist is Julia's slave, causing Ashley to remark that [Ashley] is a mistress-by-proxy. If the Protagonist tries adding Ashley into the party at this point, Julia will automatically fill the other slot. Picking Julia and any other character, however, is possible.
After becoming Julia's slave, she shows up in the Protagonist's house for a scene. Rejecting her causes her to be sad and leave in disappointment. Otherwise, she enters and speaks with the Protagonist.
Shortly there after, Julia once more appears, this time to tie the Protagonist up, causing Ashley to peek inside on the scene and hopes she's not interrupting. Julia frees the Protagonist after a short bit and speak with the Protagonist, before the scene ends.
Julia drops by after the original two scenes and asks to meet with the Protagonist again. This time, the Protagonist is stripped naked and is holding a book that she's reading and ordering the Protagonist to sometimes flip the page.
After about an hour, she realizes this isn't going anywhere and instead reads the book over the Protagonist's shoulder. She then asks if the Protagonist is happy under her. Saying that s/he is gives an affection boost as she's happy to hear it, but saying it's rough causes Julia to agree that she's not that good of a domme, giving her a trust boost.
Ending the Relationship
If the Protagonist no longer wishes to be Julia's slave, while being submissive but before Julia becoming Cassandra's Mistress, complete the Berserker route and free Ashley. Next, speak to Julia so that she gets Cassandra enslaved and become your Mistress. As a thanks for helping her free Ashley, Julia asks if you want to retain your relationship or not. Telling her you don't want to continue it causes her to release the Protagonist and their relationship returns to a status quo once more.
Jane's Slave
To become Jane's submissive slave, the Protagonist must enslave any three people and start Jane's Private Classes. During the first one, the Protagonist casts Flirt on her when she asks if "it's awkward that [Jane] is there". The Protagonist thinks it's rather hot, but she explains she's not submissive in bed. As such, the Protagonist can agree to be the submissive party or give Jane access to his/her harem.