Hello, I'm trying to find a Yaoi or Shounen Ai that is about a man whose ex disappears/or leaves him and his ex comes back but the ex is from 10 years ago. So its a Yaoi or Shounen Ai with a time travel element.
http://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
Im not sure if this is it but this is what i thought of while reading this (▰˘◡˘▰)
I love how everything was so seamlessly connected! My favorite arcs were Lily and Ian, and Shirley and Cazarline! Phillipa and Collin were definitely the saddest and I wish we got to see the ending of their story along with Margret's and Linda's. Overall, it was an amazing webtoon!