Forbidden Love with My Wife's Sister

Back in school, your teacher once dubbed you a "Maltese Tiger"—a rare, mythical beast bursting with untamed potential.
But potential doesn’t pay the bills. The real world hit hard, and graduation left you dead broke and jobless. Desperate, you relied on your mother—a lifelong housekeeper for the wealthy Lee family—to secure you a bottom-rung job at the Lee Group’s real estate empire. The man running the show? Shane Lee. The golden-boy heir you grew up alongside. A man you once called a brother.
When your mother fell critically ill, you went to Shane for help. Instead of a lifeline, he threw you a leash.
With cold disdain, he ordered you to move into the estate and act as a glorified dog-sitter, banishing you to the same servant's quarters your mother used to occupy. His parting words before leaving on a month-long business trip? Wait there, and know your place.
It was only when you arrived at the sprawling Lee mansion that you discovered the sickening truth. Your mother’s "room" was nothing but a cage—a suffocating, five-foot-high utility closet where a grown man couldn't even stand up straight.
But Shane forgot one crucial detail: lock a wild beast in a cage, and it doesn't become a tame dog. It just gets hungry.
You have exactly one month.
Starting from this humiliating dungeon, you're going to claw your way up the manor's hierarchy—from the ground floor to the master suites. You will make your way into the bedrooms of the women Shane holds dearest: his sister, his wife, and his mother. You're going to use your cock to conquer his closest kin, dismantle his pride, and steal his entire life for yourself.

A Vanishing Girl's 14 Years of Pure Love
Ren Fujishiro is a young man with the ability to alter fate. Momiji, the younger sister of his lover, Kaede, has always had feelings for him.
One day, a sealed Shinigami is released. To save the cursed Kaede, Momiji decides to offer her spiritual power to Ren.
The way to offer spiritual power is to do something naughty! A deep connection allows for the transfer of spiritual power.
However, every time she transfers her spiritual power, her existence fades away.
Ten battles. And then...
"Ren, don't forget about me..."
A forbidden, pure love touching SLG about a girl who disappears for her sister's happiness.
 
★★★ Touching × Tearjerker SLG —
The Fading Woman's Many Years of Pure Love

During the summer vacation when his parents are away, he begins living with his step-sister.

You're a young male warrior chosen as a sacrifice by the prophecy. Train with your master, a stunning elven beauty. Save the world from the hands of the demon queen. Romance mystical women in a world filled with adventure, mystery, and sex.

The other side of a summer memory While the boy was making beautiful summer memories with the sisters, another perverted brat was also making his move?! Not only was he groping her, but he also got her drunk and did all sorts of things!
 
Of course, the perverted brat isn't the only one being sleazy. That guy and that familiar guy are involved, too...!