One day, Hino Mariya, an ordinary office lady, casually bought a lottery ticket, won the grand prize, and suddenly became a millionaire!
While dreamily thinking about how to spend her 300-million yen windfall, she accidentally dropped her bankbook.
A beautiful girl named Tenma Tsujido happened to pick up the bankbook, and then asked Hino to become her sugar mommy in exchange for returning the bankbook...?
 
(Source: Manga Yomonga, translated)
 
Note: Includes one bonus chapter.

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