Changes of Heart, Volume 8 (Changes of Heart #28-31)

Koyori and Hijiri are two people who grew up together as friends and are now a couple, living together. When they enter a long distance relationship due to Hijiri's work transfer, they agreed to put off marriage for a just a little bit. But due to their busy schedules, they become more tactful of each other, and end up missing the mark with each other. So, with the other's happiness in mind, they decide to break up. But months later, Koyori runs into Hijiri again...!