It hands you a kid who has never been chosen by anyone, then makes you watch him figure out what to do with being wanted. Setagawa starts as an errand boy for the neighborhood bullies, so used to being disposable that Kousuke's blunt protectiveness reads like a hero showing up in real life, and the show is honest that hero worship and love are not the same thing. The quieter win is Kensuke and Hasekura running parallel underneath, one boy oblivious, the other holding a feeling that has clearly been eating him for years. No spectacle, no fight-scene showboating even though Kousuke's street reputation precedes him, just cramped apartments, shared meals, and the slow admission that Setagawa's home life gave him nothing to compare this to. The teacher-student gap is a real wall and it will end some viewers' run right there. Those who stay come back for Setagawa cooking dinner for a man who eats like a truck.

Masahiro Setagawa is a fairly powerless delinquent whom the neighborhood bullies keep sending on errands. Things change when he meets Kousuke Oshiba, a man known on the streets as the Bear Killer for taking down local gangs. A year later, Masahiro starts high school alongside his former friend Kensuke and learns that Kousuke is their math teacher. As the three grow closer, Masahiro comes to see Kousuke as his hero, and Kousuke feels a strong urge to protect him. Masahiro insists he has no interest in men, yet he keeps getting drawn deeper into Kousuke's affairs. Meanwhile, Kensuke's childhood friend Asaya Hasekura returns and sees Kensuke as more than a friend. The result is a romance with a slice of life feel.