I had a childhood friend one year my senior—someone who was always like an older sister to me. In the spring of my teens―I realized the feeling I held for her was "love."
And yet... I couldn't make a move, unable to do anything but cling to the status quo... ...A new school term begins. Attending the same school as her once again, a brand-new chapter of my life started.

Being the season of fresh beginnings, I had a feeling everything was turning for the better. However... before long, a friend of mine fell head over heels for her at first sight, casting a dark cloud over my everyday school life. Then came the summer of that year... Due to a certain turn of events, the three of us—me, her, and my friend—ended up taking a trip together to the tropical resort known as the "Heartland Islands."
Perhaps deep down, I was secretly hoping for some kind of "change" from this chance.

What that change might bring upon us, I didn't know. ......All I knew was the firm resolve in my heart: I had to finally settle "these feelings" once and for all. Surely, this summer will be the turning point...... I can feel it. Far away from the hometown where we grew up, on this southern island, our stagnant time was finally about to start moving again――――...