From Strangers to Something More: A Stepsibling Love Story When his father remarries, Yuuta Asamura unexpectedly gains a new stepsister—Saki Ayase, the most admired beauty of their school year. With both of them having witnessed the failures of their parents’ past relationships, they make a promise: not to get too close, not to clash too much, and to maintain a comfortable, vague distance. Yet beneath her flawless appearance, Saki is a girl who has shouldered her family’s burdens alone, unsure how to lean on anyone else. Yuuta, meanwhile, struggles to figure out how he should treat his new sister. Living under the same roof, the two begin to discover the quiet warmth of companionship. With each passing day, their relationship slowly shifts—from strangers to something gentler, deeper, and perhaps even romantic. A heartwarming everyday story of family, growth, and the first steps toward love.