All around the world you can find some coins, these coins are of no importance to you, but in Treno, Queen Stella collects them and she's willing to give you a reward for every coin you deliver. The more coins you give her, the better the prizes will be.

Aries
"The story of 12 Zodiacs. The 11 Zodiacs pondered. How best to catch Virgo's Heart? Aries headed East."

Taurus:
"Taurus had an idea. He would give Virgo a gift. Through the forest and over the mountain, he found a star."

Gemini:
"Gemini thought by the river: 'I will sing her a song'. He didn't know where she was, but he hoped his song would reach her."

Cancer:
"Cancer headed to the cape where Virgo waited. The sun was setting into the ocean. Will he finally see her?"

Leo:
"Leo was waiting for the sun to set into the ocean. Then Cancer showed up, and they began to fight. Into the ocean they fell."

Virgo:
"Watching the sunset from the cape, Virgo whispered, 'My only wish is to be with you now...'"

Libra:
"Libra was a perverse fellow. He would always walk in the opposite direction of the sun. Would he ever see Virgo?"

Scorpio:
"Scorpio was very timid. He always looked at his shadow, until one day, he decided to look away. He walked up a hill."

Sagittarius:
"Sagittarius dashed through the night, defying the chilly northern wind that was touching his right cheek."

Capricorn:
"Impatient Capricorn ran up a hill toward the sun and fell asleep from exhaustion."

Aquarius:
"Aquarius arrived late. He asked everyone, 'Who kissed Virgo?'"

Pisces:
"Pisces said to Aquarius, "Virgo made her choice. Go see him and he'll tell you the rest."

Opiuchus:
"Their future was uncertain, but Scorpio and Virgo kissed in the light of dusk that moment meant everything." ~ Opiuchus ~

All the coins point to the actual location of the Opiuchus coin. Mountains and forests, near the ocean, clearly in the East, in a hill, probably surround it. Leo and Cancer felled in the sea right? Probably there's something in the sea near the location of the Opiuchus Coin. It's somewhere between night and day... with a sunset. It's of course Quan's Dwelling, where you found Scorpio. It's in a hill, near the sea (where you can find a treasure with Choco) surrounded by forests, with a beautiful sunset between the night (Treno) and day |(Alexandria). Go to the location where you found Scorpio and you will get Opiuchus. Now for the prizes you can get...