She unexpectedly reunites with her childhood friend's younger sister after three years. "I've always had a crush on you." After being confessed to, she engages in multiple sexual encounters within two days. (Tsukino Kasumi HODV-21977)

I long for this kind of pure romance!! I unexpectedly reunite with the younger sister of my childhood friend, with whom I had grown estranged after the accidental death of our childhood sweetheart. She had been my childhood friend, like a younger sister, since we were children, and we'd been together since I was old enough to know each other, but we drifted apart after I started working. Then her brother was in a car accident, and we never had a chance to see each other again. But during this chance reunion, our feelings for each other, now grown up, begin to rekindle, a tender and loving bond.