Durarara!!
Rampant Evil (1x3)
:
Anri Sonohara, a classmate of Mikado's become class representative along him. While goofing off with Kida, Mikado spots Anri in trouble and decides to lend a hand to her and coincidentally, getting himself into a clash involving the dangerous Shizuo Heiwajima and his sworn enemy, the elusive Izaya Orihara.