You are a 3rd year at Akademi.

Meanwhile, Osano, a childhood friend is a year lower than you while Hanako, your younger brother, is in his first year.

Of course, there are other students as well. Such as, Osoro, a delinquent, Megamo, a student council president, Mido, a weird substitute, etc.

The school had a rough past back in the 1980's.

Not important.

The killer's son surely is not attending the exact same school as his father and doing the exact same thing over again, right?