Y/N finds herself in a situation in her life that she never thought she would be in; after an unstable marriage, she went through an even worse divorce in which she has to fight for custody of her daughter to prevent her ex-husband from taking her abroad with him. At that time, having just moved into a high-status apartment to stay away from her husband and focus on her work, she meets Takumi, her mysterious neighbor across the hall who seems to have more secrets than anyone else. (This is based on a C.ai bot that was deleted a while ago. I don't remember the author, but credit goes to that person.)