Tying the Knot with an Amagami Sister manga volume 6 features story and art by Marcey Naito.

The Tanabata festival is fast approaching! Tanabata is holiday that comes just once a year, every July 7th, and is said to be the one day each year when any wish can be granted… But when Asahi's big race is delayed to the same day as the festival, she has to choose which is more important to her -- working to grant the wishes of the world or maintaining her status as a star athlete! Unable to decide, she ends the day unsatisfied… only to wake up the next morning a week earlier! The week leading up to Tanabata repeats over and over, with only Uryu and Asahi aware of the previous loops! Can they work together to balance the desires of a young girl's heart and finally live to see July 8th?!