Good art, but horrible pacing.
A alternative title should be "Flasback story : My first loves and I".
All of this story happen only on a short time, so you have TONS OF FLASHBACK in each chapter to develop the girls...
And sometime, it can be ridiculous, or just extremely annoying when a sex-scene is cut several times by flashback.
Again, another H-Manhwa with only the art as the saving point, everything else is so-so.