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Hey, guys! I'm looking for this BL manga, it's my favorite. The couple met as high schoolers and often they would pretend there's a shark etc when crossing the streets. They became a couple but when they were already working, the other married a girl. The ending is they met again while uke went to fulfil his lifelong dream of seeing Aurora borealis. It's a really great manga with movie adaptation, I think. Thank you in advance.