Hitohira no Koi ga Furu

Hitohira no Koi ga Furu summary:

[Summary by: Love_blossom] It's been told that if a couple sees the blue train at exactly 6 am together, then they'll be together forever! If they see the blue train at exactly 10 pm, then they'll break up! Haruru is finally going out with the guy she likes, Nagi. She hopes to see the blue train at 6 pm with him. But what if she sees it with someone else....? From Nagareboshi Manga: There's a jinx at Haruru's school - if a couple sees the blue train at 6 am together, they'll be together forever! But if a couple sees the blue train at 10 pm together, they'll break up! Haruru is going out with Nagi, a boy who goes to another school, and their love is just starting to blossom. But what happens when Haruru happens to see the 6 am blue train with someone else?!