Despite some turbulent times, Aoi and Shusei's relationship is going well. Each day, they forge new memories together, and their love grows even stronger. One day, their neighbor Wataru gets a knock on the door... It's Shusei's older sister Eri, and she's in trouble! She's on the run from a persistent ex and needs a place to crash. Wataru takes her in, and the two just might hit it off!