ok, let me get this straight.. the life of sakurai yuuto is like this: he was born some yr on the 70s or 80s (as he looks like a man in his 30s in 2007, Ryoutarou timeline).. he grew up n likes to observe stars, studying abt stars, ambition is to become an astronomer.. then when he reached his youth age (somewhere when he was 17 to 21 yrs old), he was approached by his future self.. his future self told him all abt the future, the imagin, n the secret of the junction point.. his future self oso gave him the zeronos belt, deneb n the zero liner, and then calling him to time travel to the future yr 2007 to protect his future wife, airi.. yuuto then willingly travel to the future 2007 with deneb n meets Ryoutarou. he stays at yr 2007 to assist ryoutarou in defeating the imagine till the series finale.. after that he goes back to his original time, appearing in the future 2008 again for the climax deka n final countdown scene.. after that yuuto return to his original time in the past again.. because of his future self showing up prior to his actions in future yr 2007, n he used up the zeronos card, he became alone in his own time. he oso knew that the imagin that will come to attack him in his life towards the day 10 Jan 2007 because of his past actions in the future.. therefore he seems to appear everywhere when the imagine appear to target him, n luckily for him he knows that his past self n den-o will show up to defeat the imagine for him.. then later he joined the both of them into battle one last time (the battle with albino lion imagine with zeronos zero form n den-o liner form) on 10 Jan 2007 before heading to the lake for the final battle with kai n sacrifices himself..
he knows he will sacrifice himself, n know he hv to do this because he realized it when he travel to the future on 10 jan 2007 n saw the scene when airi was at the lake..
well, is this the life of sakurai yuuto in the story? do i get it right?