Secret Staycation with My Girlfriend’s Sister

Synopsis

Amafune Sayoko has been my girlfriend since my school days. I love her dearly, and after getting a job, I immediately began thinking about marriage. We’ve been in a serious relationship with marriage as the goal, and recently started living together with my family’s approval to prepare for our wedding.

Sayoko has a younger sister, Emiru—a serious girl who’s awkward with people and a bit socially clumsy.

Their family home needs extensive renovations, so during construction, their parents will move into a monthly rental apartment near their workplace. However, Emiru is still a student, and moving with them would make her school commute inconvenient. So she decides to live temporarily at my house, which is more convenient for her school.

At first, Emiru barely greeted me and hardly spoke at all. But over time, though she never smiled, she gradually warmed up and her irritable demeanor faded.

Then one day, as we work and study side by side, Emiru starts fidgeting and touching me—not accidentally, but deliberately feigning accidents. She clings to me, intentionally bumping hands and tangling feet, her awkward yet somehow seductive gaze fixed on me…