The night that changed everything

(Y/N) is a 18 year old teenager that enjoys his life with his friends such as Shirou,Rin,Sakura and much more.He likes to help people and overall a great guy to befriend with and because of his popularity of him with the girls made a couple of guys got jealous but some of them wanted to be close to him to look cool and overall he had a wonderful life of a completely normal teenager or is he?