Gimai Seikatsu

After their parents marry, Yuuta Asamura and Saki Ayase become stepsiblings and begin sharing a home. Both have learned difficult lessons from their parents’ previous relationships, so they agree on a comfortable distance from the start: no forced closeness, no hostility, just clear boundaries and mutual respect.

Saki is used to relying only on herself, while Yuuta is unsure how to treat a girl who has suddenly become family. Through meals, schoolwork, jobs, and quiet conversations at home, the distance they chose begins to shift without either of them announcing it. They learn how to depend on one another and how someone who was a stranger yesterday can slowly become important, leaving a question neither wants to answer too quickly: when does this stop feeling like a simple relationship between stepsiblings?