1: Kintarou-kun?

An Alternate Universe story about Uesugi Fuutarou and Nino Nakano. Through love ties each other, ever since Nino started to confess, Fuutarou was thinking what she actually meant.

As the two started to know more of each other, instead of rather Fuutarou disguising as Kintarou, he rather show Nino his true self, and reveals that the kid in the picture was him.
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Note: This book is focused on a single ship. No other quintuplets has fallen for the MC.