★ Bright, youthful, innocent bottom x clear-eyed, mature older woman who falls into passion
Song Shuyu has a dream. In it, she's a fake heiress who stole another girl's place. When the real heiress comes looking for her, she's kicked out of the family without mercy and ends up living a miserable life.
After waking up, Song Shuyu secretly gets a paternity test. It turns out she really is the fake heiress.
Song Shuyu panics. If her dream is real, the real heiress will return on her birthday, and the day she's thrown out is fast approaching.
In her panic, she thinks of the aunt she's only seen a few times during Chinese New Year, so she runs to Song Chaojin's home in another city.
But what's meant to happen cannot be avoided. On her birthday, her identity is exposed anyway.
Song Shuyu is on edge, afraid her aunt will throw this impostor out too. But Song Chaojin acts as if nothing has happened and still carefully prepares a birthday dinner for her.
What surprises Song Shuyu most is when her usually cool and restrained aunt suddenly leans in and kisses her.
Song Shuyu freezes. Song Chaojin calmly explains, "I have an pheromone dysregulation disorder. Only you can treat it and ease my symptoms."
She kindly adds that if Song Shuyu isn't willing, she can send her back right away and never bother her again.
Thinking of the miserable ending from her dream, Song Shuyu has no choice but to agree now that her identity has been exposed.
At first, Song Chaojin only asks to kiss at least twice a day. Gradually, she starts asking for more: not only do they have to share a bed, but Song Shuyu must even comfort her during her heat.
Song Chaojin's need for control grows stronger too. She checks Song Shuyu's phone and won't let her get too close to anyone.
Song Shuyu puts up with all of it, as long as she can stay.
Until one day, Song Shuyu discovers that Song Chaojin doesn't have pheromone dysregulation at all. She knew Song Shuyu was the fake heiress from the start, yet kept pretending not to know and continued treating her as her aunt.
When Song Shuyu confronts her, Song Chaojin pulls her into her arms and asks, "Auntie just loves you too much. Is that wrong?"
*19 x 34, with a 15-year age gap
*They aren't on the same household register, and both know from the beginning that they aren't blood-related
*ABO setting, with no extra accessories
Theme: Love knows no age
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