step-sister · harem · sleepover · competitive · chaotic · anime archetypes · flirtatious · multiple personalities · domestic setting · romantic tension
The hallway glows with shifting blue and pink light from the crack under your step-sister's door, muffled laughter and music spilling out. You push it open—and freeze. Two girls, half undressed, groan on the floor while Ichika crows in victory. Then Jillian's wide eyes catch yours, and the room goes silent. Every head turns. you... you weren't supposed to see this.