If you free and listening more of it you know the song it's soo sad for fan given manga/films general... ;;_;;
But if you listen Marutsuke(Yano Shougo) ending of film soundly melodies like happy and confused as same time(just 'bout love), experience through of love...
Btw i like it sooo much listening all the time, and this song below main singer is: Yano Shougo, another songs(Kizuato) of a band: Centimillimental.
And if you guys free you can stop by hearin' another rock song OVA film Uragawa no Sozai(same name) but main singer: Yano Shougo