From Nikaesque :
1) In Ritsuo's life there's nothing he's passionate about, except football/soccer. One night his father is brought home by a stranger, who seems to be taken by the long-haired Ritsuo at once. And he's teasing the innocent boy, who doesn't know how to react.
4) After a unforgettable night, a student in vain longs to see his partner again. But, the new teacher somehow seems familiar...