Futsuu no Atashitachi

Hinako and her best friend Mayu have finally started going out, but after only a week Mayu breaks up with her out of the blue. Desperate, Hinako reaches out to Mayu as she walks away but slips and falls down a staircase... and is transported back in time a week to when they had just kissed for the first time! Can Hinako become the perfect girlfriend and avoid getting broken up with in just a week?