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In order benefit their families, Koyuki (Age 16) was wed to Shin (Age 37). Despite the large age gap...
I just finished reading this on Feb 24 2024 and it's basically a wholesome romance about a 30 year old yokai supernatural and a cute teenage girl (I know the age gap is weird but they don't do anything like kissing and weird stuff,,, he's waiting til she's an adult at the very least)