I think I got the gist of it. Oh, and there needs to be a Sexual Abuse tag, (warning) there is rape in chapter 4.
Story: From what I understand, (there is Rio, the seme, and Sui, the uke) Sui picked up a time traveler and they've met several times (past and present). They fell in love with every meeting. Sounds pretty romantic, right? It is, but it's also dark in chapters 4-5. Although the plot is interesting, it was executed poorly. And sometimes I got confused with the events that occurred in some chapters.
Characters: Sui is an interesting character. I was quite surprised about the identity of Jade, although now that I look back on it it should've been obvious. Rio is a seme with a very common personality that appears in most indecent yaoi. He was very predictable and made the story corny. The only time I could really get a glimpse of his character was in chapters 4-5.
Overall: 2/5 stars