What is this Anime??? PLZ?

Can someone tell me what anime is this (read below)

I remember watching episode 1

some of the things I remember is this guy before going to school he visited his father to bring him his lunch. He was hurrying to the school bus riding his bike and after he got there he line up with his other 2 friends 1 boy 1 girl I dunno their name to get on the bus... He saw the white hair girl having trouble because she doesn't have an bus pass or something so he let her borrow his bus pass so then when they got in the school the girl was acting weird and I think she blow up or died I don't really remember but she said "sorry to get you involve with this" then he got some virus I think because his whole body was changing and aliens attack the school the girl friend went to the bus to check on him but she saw a white alien thing so yeah lol sorry if my explanation is confusing >.< If someone can tell me the title of this anime I will give you 10pts Thanks a lot!