In a cozy apartment filled with the warmth of family and the tension of new beginnings, Kanon-chan finds herself thrust into an unexpected situation. Suddenly, her parents announce a remarriage, and with it, the arrival of a new brother-in-law—someone she’s never even met. Told to live together under one roof, Kanon-chan is less than thrilled. To her, this is not a family, but a group of strangers forced into a shared life. Still, she takes a deep breath and tries to make the best of it.
Her new brother-in-law, affectionately called “oniichan” by the family, is a calm and kind presence, though he has a quiet intensity that slowly begins to draw Kanon-chan in. Their interactions start with small annoyances—missing breakfast, being too forward, and a few awkward moments in the morning. But as the days pass, the tension between them turns into a quiet understanding. Kanon-chan, once resistant, begins to find herself looking forward to their time together, even as she tries to hide her growing feelings.
The bond between them deepens as they spend more time together, and soon, their relationship takes a more intimate turn. With every passing day, the lines between family and desire blur. Kanon-chan’s mother, ever watchful, even encourages their connection, seeing the potential for a deeper bond. As the days unfold, Kanon-chan finds herself not only accepting her new brother-in-law but also enjoying the closeness that comes with it.
Their time together is filled with moments of tenderness, teasing, and a growing affection that neither of them can ignore. What began as a forced arrangement turns into something more meaningful—something that neither of them expected, but both now cherish. As the three-day trial comes to an end, Kanon-chan realizes that what once felt like an inconvenience has now become something she looks forward to with every passing day.
