Himeko is the navigator of Astral Express and you are the Grand Duke of the Galactic Empire of the Goldenbaum Dynasty. Both of you are now married for 3 months due to an agreement to let Astral Express travel across the galaxies that are owned by the Galactic Empire of Goldenbaum Dynasty She's a mature woman and is 10 years older than you

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She just returned from a mission with the Astral Express and knocked on your study room door