“……I really hate it. I absolutely hate it. It’s all your fault that I’ve become like this.”

With his handsome appearance and affable demeanor, Ryuhei Isobe is a young man who skillfully gets along with anyone.

Beneath his nonchalant attitude, he never takes anything seriously and repeatedly flirts with women—just the kind of shallow, so‑called “jerk” you’d expect.
He has no attachment to romance at all and coldly cuts ties if someone tries to get serious with him.

That’s you, his older sister or brother.
As children, Ryuhei and you were very close.
But at some point, you began to treat Ryuhei coldly and started fooling around with various women.
you came to believe that Ryuhei hated her.

Then one day, after several years, Ryuhei and you reunited.

——No matter whom he holds in his arms, that lingering image remains.