In "secret code" dating culture, the numbers 21, 6, and 30 are often used to categorize or "score" relationship compatibility.
"21 06 30 Relationships and Romantic Storylines" presents an interesting concept that could appeal to audiences interested in contemporary romantic narratives with a specific temporal context. Its success would largely depend on how well the stories are told, the depth of character development, and the relevance of themes to both the period in question and universal audiences.
I did not get my happy ending with him. We parted ways amicably two weeks later. But I stopped looking at 21/06/30 as the day my romantic storyline failed. Instead, I saw it as the day my understanding of relationships grew up.