But Summer wasn't the villain. She was the season — warm, fleeting, beautifully indifferent to the calendar of his heart.
This sounds like you're referencing the film and focusing specifically on the character Summer Finn (played by Zooey Deschanel). 500 days of summer summer
When she left, he finally understood: It wasn't a love story. It was a story about love — and how sometimes, the person who changes you doesn't have to stay. Or, if you meant something else by "500 days of summer summer" — like a remix, a song lyric, or a specific scene — let me know and I’ll adjust the piece accordingly. But Summer wasn't the villain
If you're looking for a (analysis, poem, or reflection) about Summer from the film, here’s one: Title: She Wasn't Wrong When she left, he finally understood: It wasn't a love story