Searching for a yaoi manga

I remember the uke and seme are dating. The uke and the seme's fathers arent on good terms, and so was the uke with the seme at first. But they started dating anyways, and one day, the seme died while saving a girl's life. The uke became depressed and (I'm not sure if he tried to kill himself), his parents put him to this new 'hyper hibernation' so that the people in the future can wake him up when technology advances that they can invent an exact replica of his dead boyfriend. It's a sci-fi manga, and the uke sleeps, or was put to sleep, for a long time (twice or something), I'd be really happy if someone can remember it's name. (If you need more info, I can say it, cause I remember most of how the story goes, just not the name)