Ooh what's this? A parallel universe where Sungyeon has past memories of being with Hosik?

I think it is the middle life ╮(￣▽￣)╭
After the first life that happened. And in the next life, I think where it turns modern and got the babies.

Oh could be true! They died during the joseon era then got reincarnated during this era and Sungyeon has memories of his past life which causes him to become love sick because he's missing someone he never met