Closet Sublet: When Ashe and Kyle take up residence in the twins' apartment, Kyle is left with no choice but to use a walk-in closet for a bedroom.
Cast Full of Pretty Boys: This is a dating sim for girls, it's be expected.
Leni's modus operandi is to use a girl and toss her aside without remorse, while Seizh openly maintains a harem.
The Casanova: Leni and Seizh both have instant fan clubs of schoolgirls that they pick conquests from.
Cain and Abel: Leni and Seizh's Sibling Rivalry is in a sort of ceasefire state at the beginning of the game, but the resumption of open hostilities is likely.
Any gagging only barely qualifies as such (since it's no fun if Ashe doesn't make any sounds.) Usually Ashe finds her hands tied behind her back with her own hair ribbon before she knows what hit her.
Bound and Gagged: A bit of this to be found mainly on love/hate paths, all in the name of exploitative sexiness.
In one of his endings, he goes full-on Living Doll Collector and dresses Ashe in a frilly Creepy Doll outfit. The more deranged he becomes, the more blatantly he treats Ashe like a plaything.
Break the Cutie: This is the stated intention of love interests with love/hate paths, but Seizh is cutie-breaker extraordinaire.
So he tries being cruel to her to drive her off. He legitimately starts to care about Ashe's well-being, but he knows that if she sticks with him, there's nothing but misery in store for her.
Break Her Heart to Save Her: Sena's motivation in his true love paths.
Sena's demeanor is generally more pleasant in his love/hate route, though his intentions are anything but.
Bastard Boyfriend: Love/hate routes turn most of the boys into these, though Sena is the opposite.
He's justifiably reluctant to explain this to her, and this denial of affection is hard on Ashe.
Anywhere but Their Lips: In his pure love route Sena avoids kissing Ashe, since he'll effectively enslave her if he does.
Always Second Best: Seizh feels this way in regards to Leni, who always seems to beat Seizh to the things he wants.
Almost all of the love interests have paths in which they force themselves on the heroine.
All Men Are Rapists: No matter how sweet they may be otherwise, the power dynamics between the characters can lead the guys in this game into some really dark headspaces.