In this AU, when someone turns age 16 they receive a tattoo on their wrist. It’s one specific thing about their soulmate, and Chuuya was looking forward to it for YEARS.

Waiting for his soulmate to come, and he could be happy! But no, of course not. Chuuyas now 17 and still has not received a tattoo. He gave up at that point, until one morning on his 18th birthday—

A symbol appeared.